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1

Solé, Pijuan Ester. "The cognitive side of pain experience in adolescents." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/352211.

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El dolor és el resultat de la interacció de factors físico-biològics, psicològics i socials segons el model biopsicosocial. Aquesta tesi doctoral es centra en els aspectes psicològics específicament en els factors cognitius (el catastrofisme davant el dolor, les creences respecte al dolor i la fusió cognitiva). Per a mesurar la dimensió cognitiva en els joves de forma adequada és necessari disposar d’eines apropiades i validades. Inclou 4 estudis, 3 avaluen les propietats psicomètriques de qüestionaris autoinformats en escolars catalans (estudi I: l’escala de catastrofisme al dolor per a nens; estudi II: la versió revisada del qüestionari pediàtric d’actituds davant el dolor; estudi III: el qüestionari de fusió cognitiva) i un l’altre (estudi IV) explora les associacions entre la fusió cognitiva i algunes variables associades al dolor. L’estudi I i III usaren un procediment de retrotraducció per desenvolupar les versions catalanes d’aquests qüestionaris. L’estudi II ha desenvolupat una versió modificada del qüestionari pediàtric d’actituds davant el dolor. Les conclusions més importants d’aquesta tesi són: 1. L’escala de catastrofisme al dolor per a nens ha mostrat puntuacions fiables i vàlides en escolars catalans. L’estructura factorial original de 3 factors ha estat replicada. 2. La versió pediàtrica revisada del qüestionari d’actituds davant el dolor ha presentat unes puntuacions amb una fiabilitat adequada per a totes les escales exceptuant l’escala de Cura Mèdica i una bona validesa de criteri excloent les escales de cura mèdica, medicació i emoció. L’estructura original de 7 factors ha estat confirmada. 3. El qüestionari de fusió cognitiva ha presentat puntuacions vàlides i fiables quan s’ha utilitzat en adolescents catalans. 4. La fusió cognitiva s’ha observat associada amb la intensitat del dolor , la discapacitat i el catastrofisme. També s’ha vist que actuava de mediador entre el catastrofisme al dolor i la discapacitat.<br>El dolor es el resultado de la interacción de factores físico-biológicos, psicológicos y sociales según el modelo biopsicosocial. Esta tesis doctoral se centra en los aspectos psicológicos específicamente en los factores cognitivos (el catastrofismo ante el dolor, las creencias respecto al dolor y la fusión cognitiva). Para medir la dimensión cognitiva en los jóvenes de forma adecuada es necesario disponer de herramientas apropiadas y validadas. Incluye 4 estudios, 3 evalúan les propiedades psicométricas de cuestionarios autoinformados en escolares catalanes (estudio I: la escala de catastrofismo ante el dolor para niños; estudio II: la versión revisada del cuestionario pediátrico de actitudes ante el dolor; estudio III: el cuestionario de fusión cognitiva) y el otro (estudio IV) explora las asociaciones entre la fusión cognitiva y algunas variables asociadas al dolor. Los estudios I y III usaron un procedimiento de retrotraducción para crear las versiones catalanas de estos cuestionarios. El estudio II ha desarrollado una versión modificada del cuestionario pediátrico de actitudes ante el dolor. Les conclusiones más importantes de esta tesis son: 1. La escala de catastrofismo al dolor para niños ha mostrado puntuaciones fiables y válidas en escolares catalanes. La estructura factorial original de 3 factores ha sido replicada. 2. La versión pediátrica revisada del cuestionario de actitudes ante el dolor ha presentado puntuaciones con fiabilidad adecuada para totas las escalas (exceptuando la escala de Cuidados Médicos) y buena validez de criterio excluyendo las escalas de Cuidados Médicos, Medicación y Emoción. La estructura original de 7 factores ha sido confirmada. 3. El cuestionario de fusión cognitiva ha presentado puntuaciones válidas y fiables cuando se ha utilizado en adolescentes catalanes. 4. La fusión cognitiva se ha demostrado asociada con la intensidad del dolor, la discapacidad y el catastrofismo. También se ha observado que actuaba de mediador entre el catastrofismo y la discapacidad.<br>According to the biopsychosocial model of pain, pain is the result of the interaction between biological/physical, psychological and social factors. In this Dissertation we focus on the psychological domain and specifically on the cognitive factors of pain catastrophizing, pain beliefs and cognitive fusion. Suitable, validated tools for assessing these cognitive constructs are needed in order to properly evaluate the cognitive dimension of pain in young people. This Dissertation includes 4 studies, three of which examine the psychometric properties of self-report questionnaires (Study I: the Pain Catastrophizing Scale for Children, PCS-C; Study II: the revised version of the Pediatric Survey of Pain Attitudes, Peds-SOPA; Study III: the Cognitive Fusion Questionnaire, CFQ). Study IV explores the associations between cognitive fusion and certain pain-related variables. Study I and Study III used a back translation procedure to create the Catalan versions of these scales. Study II created a new version of the Pediatric Survey of Pain Attitudes. The most important conclusions of this Dissertation are: 1. The PCS-C, one of the most common questionnaires for evaluating catastrophizing in children and adolescents, showed reliable and valid scores when used with Catalan schoolchildren. The original three-factor structure with 13 items was confirmed. 2. The Peds-SOPA is one of the main scales for evaluating the pain beliefs of children and adolescents. The scores from our revised version demonstrated adequate reliability for all scales (except for Medical Cure) and good criteria validity for most scales (except for Medical Cure, Medication and Emotion). The original Peds-SOPA seven-factor structure has been confirmed. 3. The CFQ, a brief measure of cognitive fusion, has shown valid and reliable scores when used with Catalan adolescents.
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2

El, Mansouri Mouna. "On the dark side of proactivity : essays on proactive behavior and its cognitive, emotional, and behavioral consequences." Thesis, Cergy-Pontoise, Ecole supérieure des sciences économiques et commerciales, 2022. http://www.theses.fr/2022ESEC0001.

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Les essais de ma dissertation explorent comment les individus qui se comportent proactivement peuvent subir des conséquences négatives dans trois domaines : le fonctionnement cognitif, les états émotionnels et le comportement ultérieur au sein d’organisations. Mon travail étend la littérature naissante sur le côté obscur de la proactivité et aborde trois limites de la recherche actuelle. Premièrement, les recherches antérieures se sont concentrées sur les avantages de la proactivité. Là où les chercheurs ont exploré ses inconvénients potentiels, ils se sont limités aux résultats émotionnels et sociaux, mais n’ont pas abordé ses coûts cognitifs. Mon premier essai comble cette lacune en élaborant une théorie sur comment la proactivité (ici l’amélioration par des individus de la façon dont leurs tâches principales sont effectuées) affecte les performances cognitives en fin de journée. Je théorise que cette proactivité implique de s’écarter des méthodes de travail établies et de s’engager dans des activités cognitivement exigeantes. Des niveaux élevés d’exigences cognitives favorisent la fatigue mentale au long de la journée de travail, ce qui se manifeste par une détérioration des performances cognitives en fin de journée. À l’aide de deux études de journal, j’ai démontré que la proactivité était négativement associée aux performances cognitives en fin de journée, même en contrôlant la performance des individus dans leurs tâches principales et leurs performances cognitives en début de journée. Mes découvertes améliorent notre compréhension de la nature cognitivement exigeante de la proactivité et fournissent un support empirique pour ces coûts cognitifs à travers le prisme de la fatigue mentale. Deuxièmement, une autre limite de la recherche est qu’elle s’est concentrée sur des classifications globales des états émotionnels négatifs par rapport aux positifs comme résultats de la proactivité. Cette classification ne tient pas compte du fait que des émotions discrètes spécifiques peuvent différer dans leur signification et leur conséquence. Sur la base de la théorie de l’évaluation cognitive des émotions, dans le second essai, j’étudie comment les individus proactifs réagissent face à la résistance des collègues à leur comportement proactif. Je propose que, pour les individus proactifs, la résistance à leur proactivité est associée aux émotions négatives de la colère et de l’anxiété. Ces émotions affectent différemment à leur tour les comportements ultérieurs. À l’aide d’une étude de journal avec échantillonnage d’événements, j’ai découvert que les individus ressentaient de la colère et de l’anxiété suite à une résistance à leur proactivité. De plus, la colère était associée à un comportement de travail contre-productif, tandis que l’anxiété était associée à un comportement proactif supplémentaire. Ces résultats mettent en évidence le côté obscur de la proactivité en ce qui concerne les émotions négatives en cas de résistance et montrent que certaines émotions négatives (anxiété), considérées comme dysfonctionnelles, peuvent être liées à des résultats positifs et alimenter un comportement proactif supplémentaire. Enfin, la troisième limite que ma dissertation aborde concerne la prise en compte limitée du déroulement de la proactivité en tant que processus. Dans les deux essais, en prêtant attention à ce qui se passe après un comportement proactif, je ne considère pas seulement le moment unique où le comportement a lieu, mais considère la proactivité comme un processus qui englobe des résultats cognitifs, émotionnels et comportementaux. Dans mon premier essai, mes découvertes montrent que l’impact de la proactivité comme activité cognitivement exigeante peut persister au long de la journée et se répercuter sur d’autres tâches impliquant des performances cognitives. En explorant la résistance aux initiatives dans le second essai, je mets en évidence les dynamiques qui peuvent sous-tendre les processus de proactivité<br>The essays in this dissertation explore how individuals who engage in proactive behavior may experience negative consequences in three domains: cognitive functioning, emotional states, and subsequent behavior within organizations. By doing so, my work extends the nascent literature on the dark side of proactive behavior and address three limitations of current research. First, the predominant focus of prior research has been on the benefits of proactivity. Where researchers have explored its potential drawbacks, they focused on emotional and social outcomes, but did not address its cognitive costs. My first essay addresses this gap by building theory on how task proactivity (i.e., improving the way core tasks are done) affects end-of-day cognitive performance. I theorize that task proactivity involves deviating from established ways of working and engaging in cognitively demanding activities. Elevated levels of cognitive demands foster mental fatigue throughout the workday which manifests as a deterioration of end-of-day cognitive performance. Using two daily diary studies I showed that task proactivity was negatively associated with end-of-day cognitive performance, even when controlling for task performance and beginning-of-day cognitive performance. My findings enhance our understanding of the cognitively demanding nature of task proactivity and provide empirical support for its cognitive costs using a mental fatigue lens. Second, another limitation of existing research is that it has focused on aggregate classifications of negative versus positive emotions as outcomes of proactivity. Such a focus does not take into consideration that specific discrete emotions may differ in their meaning and their consequences in the context of proactivity. Building on appraisal theory, in the second essay I investigate how proactive individuals experience and react to resistance to their proactive behavior within organizations on a daily basis. I propose that, for proactive individuals, resistance to their proactive behavior is associated with the negative emotions of anger and anxiety. These emotions in turn affect differentially subsequent behavior. Using a diary study with event sampling, I found that individuals experienced anger and anxiety following resistance to their proactive behavior. Furthermore, anger was associated with counterproductive work behavior while anxiety was associated with further proactive behavior. These findings highlight the dark side of proactivity when it comes to experienced negative emotions in the face of resistance and show that some discrete negative emotions (anxiety), usually seen as dysfunctional or problematic, may be linked to positive outcomes and fuel further proactive behavior. Finally, the third limitation that this dissertation addresses relates to the narrow focus of research on the unfolding of proactivity as a process. By devoting attention in both essays to what happens after proactive behavior is enacted, I expand the focus from considering the single moment in which proactive behavior takes place to viewing proactivity as a more global process that encompasses cognitive, emotional, and behavioral outcomes. In my first essay, my findings show that the impact of a cognitively demanding activity like task proactivity may persist throughout the day and carry over to other tasks involving cognitive performance. As I explore resistance to initiatives in the second essay, I highlight the dynamics that may underly proactivity processes
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3

Leung, Isabella Hoi Kei. "Exercising against the depressing side of ‘inflammageing’: something to remember for dementia prevention." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/24240.

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Dementia is a leading global health challenge. Undoubtably, prevention strategies are urgently required to address the exponential growth in dementia prevalence. It has been estimated that up to a 30% decrease in dementia prevalence can be achieved via the reduction of modifiable risk factors through lifestyle and medical management [4]. In order to attenuate or delay dementia onset, it is essential to understand the prodromal phases of the disorder and how certain risk factors may individually or cumulatively contribute to dementia pathology and cognitive decline. Mild Cognitive Impairment (MCI) is commonly known as the prodromal stage of dementia. During this stage, not only are clinical signs of cognitive decline apparent, but also neurobiological changes in cortical and subcortical structures of the brain [5]. One of the earliest affected and most vulnerable subcortical structures, is the hippocampus. Indeed, hippocampal atrophy is a hallmark of Alzheimer’s disease (AD), which accounts for up to 70% of all people with dementia [6]. Importantly, although those with MCI are at high risk for developing dementia, a proportion of these individuals’ cognition may remain stable or even revert back to normal functioning. It is estimated that there is a reversion rate of between 8% (clinical-based studies) and 25% (population-based studies) [7]. This difference in trajectory between MCI and insidious dementia onset, and MCI and reversion back to normal cognitive functioning sheds light on important research rationales. Firstly, this difference in clinical trajectory may be due to variation in comorbidities of ageing disorders with MCI that may exacerbate or accelerate the disease progression. Simultaneously, those who revert back to normal cognition may be benefiting from lifestyle activities and practices that may reduce, manage or resolve some dementia modifiable risk factors. Without adequate sensitive and specific detection of clinical biomarkers for MCI and even dementia, however, a third reasoning behind reversion rates is undeniable. That is, the potential of false positive diagnoses of MCI at baseline measures which may also lead to misattribution error in the cause or benefits of certain treatments in reverting cognitive deficits. Therefore, until more sensitive and specific diagnostic tools are available for MCI, results from intervention and current longitudinal studies investigating the reversion of cognitive decline in MCI must be interpreted with caution. Regardless, studies are should examine common comorbid disorders that predispose individuals to dementia risk, and how they differ to those without comorbidity. Further, exploration into the neurobiological underpinnings associated with the differences (if any) are required in order to develop targeted treatment strategies. Finally, the investigation into the effects of lifestyle interventions on neurobiological differences are recommended to determine whether or not it is capable of reducing dementia risk. Depression acts as both an independent risk factor for dementia as well as a factor shown to significantly heighten the risk of MC-to-dementia conversion. Previous studies have shown that those with comorbid depression and MCI are more than twice as likely to develop AD than those with MCI alone [8]. The hippocampus is implicated in dementia studies as well as studies in MCI and depression. However, studies comparing those with and without a history of depression in MCI are lacking, with the majority of current literature focusing on current major depression. This is a particularly important area to study as cognitive deficits often remain and manifests despite clinical remission [9]. Nevertheless, there have been numerous studies suggesting that inflammation may be driving mechanism by which depression and MCI may progress into dementia. Although, these studies have conflicting results with regards to which inflammatory markers are involved since most studies only include one to three inflammatory markers. In order to address the above-mentioned gaps in the current literature, this thesis commences with a review of the literature characterising MCI as a prodromal stage for dementia, and exploring depression as a comorbid disorder that has the potential to accelerate or exacerbate the neurodegenerative processes. In particular, this thesis investigates the implications of a lifetime depression history on hippocampal volumes from transversely segmented subfields as well as longitudinal head/body/tail (H/B/T) segmentations, and memory encoding and retention. Importantly, MCI can be further categorised into amnestic MCI (aMCI) and non-amnestic MCI (naMCI) subtypes. Prior studies have shown that hippocampal changes in aMCI are likely to be driven by accumulating amyloid beta and tau pathology, and these individuals are at greatest risk for progression to Alzheimer’s disease (AD) [10-14]. By contrast, the neuropathology underpinning hippocampal changes in depression and naMCI, remains unclear [15, 16]. Whilst there has been evidence to suggest that inflammation may be a key link with depression, naMCI and dementia, the current body of literature is conflicting with regards to which inflammatory markers may be involved and studies of inflammation in remitted or subthreshold depression are lacking. Therefore, more focus of this thesis has been placed on older adults with naMCI, comparing those with and without a history of depression to elucidate possible differences between the two groups. Further, we explored the potential role of common systemic inflammatory marker C-Reactive Protein (CRP), in differentiating those with and without depression history through relationships with hippocampal subfields and H/B/T subregions. Finally, this thesis investigated, in a pilot randomised controlled trial, the effects the CogStep combined home-based exercise and psychoeducation program on a broad range of inflammatory markers, hippocampal subfields and H/B/T subregions, mood and cognitive outcomes in older adults with cognitive difficulties. In the first empirical study, presented in Chapter 3, we examined whether a history of depression affects the subiculum, CA1, DG subfields and H/B/T subregion volumes bilaterally in older adults with naMCI and whether the relationships between our hippocampal regions of interest and memory encoding and retention differed in those with and without a history of depression. We found in this cross-sectional study, that volumetric change was circumscribed to the right CA1 in those with a history of depression. Contrary to our hypothesis, we found that those with a history of depression had significantly larger right CA1 volumes. Importantly, the relationship between the right CA1 and both memory encoding and retention measures differed significantly between those with and without a depression history. Hence, for the first time in the literature, we have demonstrated that a lifetime history of depression significantly affects the relationship between hippocampal volume and memory encoding and retention in individuals with naMCI. This in turn, suggests that there may be different neuropathological underpinnings between those with and without a depression history that are unlikely due to the deposition of amyloid beta and tau pathology. In Chapter 4, Study 2 is presented, where the potential role of CRP in differentiating between those with and without a depression history was explored in older adults ‘at risk’ for dementia, namely those with naMCI or subjective cognitive complaints (SCC). Interestingly, when examining the clinical and imaging data cross-sectionally, data showed that a history of depression was associated with lower levels of CRP in blood. This is a contrasting result compared to other studies that have demonstrated higher levels of inflammation in patients with major depression. However, our results may be reflective of the acute and non-specific nature of CRP and therefore future studies should examine a broad range of inflammatory markers, comparing acute, chronic, or remitted depressive states. In addition, we found that elevated levels of CRP were significantly associated with smaller right hippocampal head and right CA1 volumes in those who have never experienced a depressive episode in their lifetime. The results from this study provides the basis for future studies investigating the aetiology behind reduced right CA1 volume and greater CRP concentration in those without a depression history and explore how this affects the clinical trajectory towards dementia onset. Of significance, as part of this study, we also validated the transversely segmented subfields by comparing T1 MPRAGE outputs to data obtained from high-resolution T2-weighted imaging of the hippocampus. Notably, we showed high concordance between the segmentation, thereby validating the use of T1 data in Studies 1-3 of this thesis. Finally, Study 3, presented in Chapter 5, provides findings from the ‘CogStep 2.0’ randomised controlled clinical pilot study. This study investigated the effects of a 12-week combined exercise and psychoeducation CogStep intervention on a broad range of inflammatory markers, hippocampal subfield volumes, cognition and mood in older adults with cognitive difficulties. Specifically, we examined the levels of CRP, IL-1, IL-6, IL-8, IL10, IL-12p70, and TNF-, which have been previously implicated in depression and dementia studies [17-19]. In this study, our results showed that our CogStep intervention produced significant reductions in TNF and IL-levels and increased upper body strength at 12-week follow-up. There were no significant differences in hippocampal volumes, verbal memory and mood in the group by time analyses. Despite this, when we compared those with and without a history of depression in exploratory analyses, we observed that there were moderate-large effects of depression history on change over time for CRP, TNF- and right hippocampal head volumes. Therefore, our findings warrant future investigations in larger studies with longitudinal follow-up periods to explore the relationship between change in inflammatory markers and hippocampal head volumes, and comparing the effects of exercise on those with and without a history if depression. In conclusion, this series of studies provides preliminary evidence that there may be aetiological differences and neuropathological underpinnings of cognitive impairment for those with and without a lifetime history of depression. Of note, this thesis has shown that acute-phase inflammatory markers have an inverse relationship with hippocampal subfield and subregion volumes in the context of depression history. Importantly, we have explored a wide range of inflammatory markers and have demonstrated that our combined exercise and psychoeducation program may specifically reduce TNFand IL- levels. The synthesised findings of this thesis provide valuable clinical insight into the role of systemic inflammation and depression history in individuals who are at risk for developing non-AD types of dementia. Additionally, this thesis supports the implementation of lifestyle changes aiming to address modifiable risk factors of dementia. Large population studies with longitudinal tracking are now required to confirm whether a depression history and associated inflammatory markers affects clinical trajectories, and how lifestyle changes are able to delay or attenuate dementia onset.
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Basterfield, Candice. "The cognitive rehabilitation of a sample of children living with HIV : a specific focus on the cognitive rehabilitation of sustained attention." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1017881.

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Pharmacological interventions to treat Human Immunodeficiency Virus (HIV) with antiretrovirals (ARVs), have dramatically improved the survival rates of HIV positive children maturing into adulthood. However, HIV-associated neurocognitive decline still persists in the era of ARVs. Within the framework of brain plasticity, a number of researchers have begun to assess the feasibility of cognitive rehabilitation therapy as a complement to ARVs to reverse neurocognitive decline as a result of HIV (e.g., Becker et al., 2012). Only one study has been conducted in South Africa, by Zondo & Mulder (2014), assessing the efficacy of cognitive rehabilitation in a paediatric sample. The current research builds on the above mentioned study by implementing an experimental approach to examine the effect of cognitive rehabilitation in a sample of both HIV positive and HIV negative children. Five HIV positive and six HIV negative children were assigned to either an experimental or control group. The experimental group underwent two months of cognitive rehabilitation therapy remediating sustained attention, whereas the control group took part in placebo activities. Sustained attention measures were taken before and after the intervention training sessions, using a sustained attention subtest from the Test of Everyday Attention for Children (TEA-CH). A Mann Whitney U Test revealed that the experimental group (Mdn=38.50) did not differ significantly from the control group (Mdn = 37.00) after the cognitive rehabilitation intervention, U=12.00, z= -.55, p= .66, r= -.17. But a Wilcoxon Signed Rank Test found that there was a significant improvement from pretest scores (Mdn=31.00) to posttest scores (Mdn=38.00) following the rehabilitation for HIV positive participants in the sample, T=15.00, z = -2.02, p= .04, r= -.90. This raises the possibility that cognitive rehabilitation could be used as a low cost intervention in underdeveloped contexts
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5

Le, Hénaff Benjamin. "Comparaisons entre groupes, anonymat, et performances cognitives : expérimentations dans les environnements numériques et en coprésence." Thesis, Rennes 2, 2016. http://www.theses.fr/2016REN20020/document.

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L’objectif de cette thèse est d’étudier comment l’identification à un groupe peut conduire à de meilleures performances cognitives en s’appuyant sur la théorie de l’identité sociale (Tajfel &amp; Turner, 1986). Cette théorie avance que l’identité sociale d’un individu repose en partie sur la comparaison entre son groupe d’appartenance et un autre groupe. La quête d’une identité sociale positive pousserait l’individu à agir pour le bien de son groupe afin de se placer dans une position avantageuse par rapport à un autre groupe. Le modèle SIDE (Social Identity model of Deindividuation Effects, Reicher, Spears &amp; Postmes, 1995) a étendu cette théorie en considérant que l’anonymat facilite le passage de l’identité personnelle à l’identité sociale et la renforce. Notre recherche a été déclinée en trois axes. Les deux premiers ont examiné l’effet de l’anonymat et de la comparaison entre groupes sur les performances à des exercices d’informatique et de statistiques réalisés en environnements numériques. Le dernier axe a étudié les effets de l’anonymat et de la comparaison entre groupes à une tâche de production d’idées créatives en situation de coprésence. Conformément aux prédictions du modèle SIDE, les résultats ont montré que la comparaison intergroupe en situation d’anonymat active l’identité sociale des membres d’un groupe et les conduits à avoir de meilleures performances à des tâches cognitives. De plus, nous avons mis en évidence que des différences individuelles, comme le niveau de connaissances antérieures, viennent modérer les effets du modèle SIDE. Les implications pratiques et théoriques de ces résultats sont discutées, et des pistes de recherches futures sont proposées<br>The aim of this thesis is to study how group identification may lead to better cognitive performance, based on social identity theory (Tajfel &amp; Turner, 1986). This theory states that the social identity of individuals is partly based on comparison of their group with another group. The search for a positive social identity should drive individuals to act on behalf of their own group, putting them in an advantageous position compared to another group. The SIDE Model (Social Identity model of Deindividuation Effects, Reicher, Spears &amp; Postmes, 1995) extends this theory by postulating that anonymity could facilitate the transition from personal to social identity, which is reinforced in the process. Our study was organized along three lines of research. The first two examined how anonymity and intergroup comparison affects performance on computer quizzes and statistics exercises in a web-based learning environment. The third studied the effects of anonymity and intergroup comparison on the generation of creative ideas in the presence of others. Consistent with the SIDE Model, we found that intergroup comparison under anonymity conditions activated group members’ social identity, leading to better performance on cognitive tasks. We also found that individual differences, such as prior knowledge, may moderate the effects of the SIDE model. The practical and theoretical implications of these results are discussed, and future research directions are suggested
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Silber, Yvonne Beata, and N/A. "The acute side effects of d-amphetamine and methamphetamine on simulated driving performance, cognitive functioning, brain activity, and the standardised field sobriety tests." Swinburne University of Technology, 2006. http://adt.lib.swin.edu.au./public/adt-VSWT20070319.105603.

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Recently there has been an increase in awareness of the role of drugs other than alcohol in the causation of road accidents and deaths, with the most recent report indicating that 33% of all Victorian (Australia) road fatalities are drug (other than alcohol) related (TAC, 2006). Currently in Victoria, one of the classes of drugs reported to be of most concern is the amphetamines. The epidemiological driving literature highlights a possible association between amphetamine use and road crashes. However, since the cognitive research generally indicates cognitive enhancing properties following amphetamine consumption, it remains unclear how amphetamines may be related to adverse driving. The present thesis was designed to explore this issue. In response to the increasing number of drug-related road fatalities, the Standardised Field Sobriety Tests (SFSTs), designed and validated for the detection and assessment of impairment associated with alcohol intoxication, are currently being employed by the Victoria Police (Australia) for the identification of driving impairment associated with drugs other than alcohol. The present thesis was designed to evaluate whether the SFSTs are a sensitive measure for identifying impairment associated with a single acute therapeutic amphetamine dose. Furthermore, the accuracy of using the SFSTs to detect driving impairment associated with these amphetamine doses was also evaluated. The present thesis examined the effects of a single acute therapeutic dose of various amphetamine preparations, on simulated driving performance, driving-related cognitive processes (assessed using standard cognitive tasks and the electroencephalogram [EEG]), and performance on the SFSTs, in healthy, stimulant-using, non-fatigued adults. The present thesis consisted of five separate experiments. The first three experiments examined the effects of d-amphetamine, d,l-methamphetamine, and d-methamphetamine, on simulated driving performance, driving-related cognitive processes, and performance on the SFSTs. Experiment 4 and Experiment 5 assessed the effects of d-amphetamine and dmethamphetamine on visual and auditory cognitive processes using the EEG. These forms of amphetamines were selected as they are commonly used recreationally by young adult drivers, and occupationally by truck drivers. Experiment 1, Experiment 2, and Experiment 3 employed a repeated-measures, counterbalanced, double blind, placebo-controlled design. In each experiment, twenty different (i.e. 60 participants in total) healthy volunteers (10 males and 10 females) completed two treatment conditions i) placebo and ii) 0.42mg/kg amphetamine (~30mg). Driving performance was assessed using a driving simulator task, which consisted of four driving tasks; �freeway traffic driving� and �city traffic driving� in both day and night conditions. Cognitive performance was assessed using a range of computer and pen and paper tasks designed to assess attention, psychomotor performance, and perceptual speed. Specifically, the tasks were: the Digit Span Test; a Digit Vigilance task; a Movement Estimation Task; the Digit Symbol Substitution Test; a Tracking Task; the Trail-Making Test; and the Inspection Time task. SFSTs performance was assessed using the Horizontal Gaze Nystagmus (HGN) test, the Walk and Turn (WAT) test, and the One Leg Stand (OLS) test. Three blood and saliva samples were obtained throughout all experimental sessions (120, 170, and 240 minutes after drug administration). The results indicated that 0.42mg/kg d-amphetamine significantly impaired simulated driving performance, in recreational stimulant users, 2-3 hours post-drug administration, when mean blood amphetamine concentrations were approximately 90ng/mL. No significant driving decrements were observed following d,l-methamphetamine or dmethamphetamine, when methamphetamine blood concentrations were 90ng/mL and 70ng/mL, respectively. There were only few driving behaviours that were found to be significantly reduced with d-amphetamine, such as reductions in signalling adherence and driving too fast for the traffic conditions. However, during all three amphetamine conditions, drivers travelled at a slower speed on the freeway at the time that an emergency situation occurred, relative to the placebo condition. It was argued that either this may result from more cautious driving, or that the reduction in speed acted as a compensatory mechanism to permit drivers to attend to other aspects of driving. Overall, the present results indicate that a therapeutic dose of amphetamine does not produce considerable impairment to driving, as only minimal amphetamine effects were observed on driving performance. In terms of cognitive performance, the results indicated that a therapeutic dose of various amphetamines has minimal effect on driving-related cognitive functioning, with some significant improvements noted in aspects of attention, psychomotor functioning and perceptual speed. This is consistent with the failure to identify significant driving impairments, described above, following a similar dose. However, the ability to perceive and predict motion and estimate �time to contact�, assessed using a movement estimation task, was affected following d-amphetamine and d-methamphetamine consumption. In terms of performance on the SFSTs, the present thesis demonstrated that following the administration of low-level d-amphetamine, d,l-methamphetamine, and dmethamphetamine, performance on the SFSTs was not impaired. Using the SFSTs, impairment associated with low dose d-amphetamine was identified in only 5% of cases, dmethamphetamine in 5% of cases, and d,l-methamphetamine in 0% of cases. These findings indicate that the degree of impairment produced with the low amphetamine dosing conditions was below the threshold of sensitivity of the SFSTs. However, as significant impairments in driving were not observed with amphetamines, the present SFSTs findings highlight that these tests are unlikely to produce false positive results during police drug evaluation procedures for amphetamine-related impairments. Experiment 4 and Experiment 5 similarly employed a repeated-measures, counterbalanced, double blind, placebo-controlled design. In each experiment, twenty healthy volunteers (10 males and 10 females) completed two treatment conditions i) placebo and ii) 0.42mg/kg amphetamine (~30mg). Tasks designed to assess visual and auditory cognitive functions relevant to driving were administered. Specifically, these processes were: divergent visual system pathways (magnocellular and parvocellular pathways); aspects of visual field processing (central and peripheral visual fields); mismatch negativity (MMN); prepulse inhibition (PPI); selective attention; resource allocation; and speed of processing. Two blood and saliva samples were obtained throughout all experimental session (120 and 200 minutes after drug administration). d-amphetamine and d-methamphetamine generally improved cognitive functioning, as assessed with visual and auditory ERP indices. Specifically, the results demonstrated that a low-level acute dose of d-amphetamine and d-methamphetamine improved early processing of visual information (indexed by improvements to the P100 component for the magnocellular and parvocellular visual pathways). In addition, d-methamphetamine improved the speed at which visual information was evaluated and processed (indexed by decreases in P300 latency), which was consistent with d-methamphetamine-related improvements in reaction time. There was a trend for d-amphetamine to improve the speed that changes in auditory stimulation were automatically detected (indexed by decreases in MMN latency). In addition, d-methamphetamine improved the ability to automatically �screen out� irrelevant and intrusive auditory information (indexed by increases in PPI of the startle response). d-amphetamine was found to improve the speed at which auditory information was evaluated and processed (indexed by decreases in P300 latency), which was substantiated with corresponding improvements in reaction time and accuracy. Although amphetamines were generally shown to enhance ERP indices, a trend was found for d-amphetamine to differentially affect different regions of the visual field, in terms of selective attention. Specifically, there was a trend-level indication that d-amphetamine improved indices of selective attention (denoted by increases in N200 amplitude) for information presented centrally, but impaired indices of selective attention (denoted by decreases in N200 amplitude) for information presented in the periphery. Although impairments to the peripheral visual field were not similarly observed with dmethamphetamine, decrements to indices of selective attention (denoted by decreases in N200 amplitude) were also found with d-methamphetamine during the auditory oddball task. In terms of driving, these results suggest that drivers dosed with low-level amphetamine may not selectively attend to and discriminate changes within the traffic environment, although further research is required to confirm this. In conclusion, the present thesis has demonstrated that a single acute therapeutic dose of amphetamine produces minimal and inconsistent effects to driving. However, some (inconsistent) evidence was found that suggests that there may be mild impairments such as decreased ability to perceive and predict motion, tunnel vision effects, and decrements to selective attention. In addition, the present thesis highlights that at therapeutic doses, amphetamines do not impair SFSTs performance, which is in accordance with the failure to identify substantive amphetamine-related decrements to driving and cognitive functioning observed in the present thesis.
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Silber, Yvonne Beata. "The acute side effects of d-amphetamine and methamphetamine on simulated driving performance, cognitive functioning, brain activity, and the standardised field sobriety tests." Australasian Digital Theses Program, 2006. http://adt.lib.swin.edu.au/public/adt-VSWT20070319.105603/index.html.

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Thesis (PhD) - Swinburne University of Technology, 2006.<br>Typescript. [Submitted for the degree of] Doctor of Philosophy, Swinburne University of Technology - 2006. Includes bibliographical references (p. 253-290).
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Andersson, Jasmine. "A thorn in the side and its equivalents in French and Swedish : One sense realized as three different idioms." Thesis, Umeå universitet, Institutionen för språkstudier, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-95565.

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The purpose of this study is to analyse how three idioms, in English, French and Swedish, despite different lexical compositions are capable of conveying the same meaning. The idioms in question are a thorn in the side, une épine au pied/dans le pied and en nagel i ögat. This study is concerned with how different metaphorical images are used to express the same meaning. Furthermore, it examines what it is in the semantics of the lexical items that enables these idioms to express the same idiomatic meaning. Using a cognitive linguistic approach the analysis is conducted at a linguistic and a conceptual level. The analysis shows that these three different idioms are capable of conveying the same idiomatic meaning because they are motivated by the same conceptual metaphor.
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Marcinkowska, Anna. "Exploratory study of market entry strategies for digital payment platforms." Thesis, Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-147994.

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The digital payment industry has become one of the fastest evolving markets in the world, but in the wake of its rapid advancement, an ever increasing gap between academic theory and the actual reality of this market widens - and especially so when it comes to entry theory. It is widely acknowledged that the world is moving towards an ever more homogeneous economy, but despite the fact that payment preferences differ greatly from country to country - research on this subject continues to revolve mainly around localized efforts. But as historical inequalities between poor and rich societies continue to dissipate - learning from nations at the forefront of technological advancement increases the likelihood that the developed strategy becomes applicable to an increased number of countries. By selecting a nation most conducive to technological growth, the purpose of this report is to map the present dynamics in its digital payment industry using both recent and traditional market entry theory. However, studies geared towards globalized strategy formulation cannot be assumed as having guaranteed access to internal company-data at all times. So in order to facilitate such studies, the level of dependency on primary data required for conducting such research needs to be understood first, which is why the work in this report is constrained strictly to data of secondary nature. This, not only to further map the characteristics of this market, but also to see how open the market is to public inspection. Ultimately, the academic contribution becomes that of providing a road-map towards adapting currently available market entry theory to suit the rapidly evolving conditions of the digital payment industry from a global perspective and, when failing to do so, the aim is to also explore avenues for further research towards this end goal.
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Zhang, Ruide. "Hardware-Aided Privacy Protection and Cyber Defense for IoT." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/98791.

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With recent advances in electronics and communication technologies, our daily lives are immersed in an environment of Internet-connected smart things. Despite the great convenience brought by the development of these technologies, privacy concerns and security issues are two topics that deserve more attention. On one hand, as smart things continue to grow in their abilities to sense the physical world and capabilities to send information out through the Internet, they have the potential to be used for surveillance of any individuals secretly. Nevertheless, people tend to adopt wearable devices without fully understanding what private information can be inferred and leaked through sensor data. On the other hand, security issues become even more serious and lethal with the world embracing the Internet of Things (IoT). Failures in computing systems are common, however, a failure now in IoT may harm people's lives. As demonstrated in both academic research and industrial practice, a software vulnerability hidden in a smart vehicle may lead to a remote attack that subverts a driver's control of the vehicle. Our approach to the aforementioned challenges starts by understanding privacy leakage in the IoT era and follows with adding defense layers to the IoT system with attackers gaining increasing capabilities. The first question we ask ourselves is "what new privacy concerns do IoT bring". We focus on discovering information leakage beyond people's common sense from even seemingly benign signals. We explore how much private information we can extract by designing information extraction systems. Through our research, we argue for stricter access control on newly coming sensors. After noticing the importance of data collected by IoT, we trace where sensitive data goes. In the IoT era, edge nodes are used to process sensitive data. However, a capable attacker may compromise edge nodes. Our second research focuses on applying trusted hardware to build trust in large-scale networks under this circumstance. The application of trusted hardware protects sensitive data from compromised edge nodes. Nonetheless, if an attacker becomes more powerful and embeds malicious logic into code for trusted hardware during the development phase, he still can secretly steal private data. In our third research, we design a static analyzer for detecting malicious logic hidden inside code for trusted hardware. Other than the privacy concern of data collected, another important aspect of IoT is that it affects the physical world. Our last piece of research work enables a user to verify the continuous execution state of an unmanned vehicle. This way, people can trust the integrity of the past and present state of the unmanned vehicle.<br>Doctor of Philosophy<br>The past few years have witnessed a rising in computing and networking technologies. Such advances enable the new paradigm, IoT, which brings great convenience to people's life. Large technology companies like Google, Apple, Amazon are creating smart devices such as smartwatch, smart home, drones, etc. Compared to the traditional internet, IoT can provide services beyond digital information by interacting with the physical world by its sensors and actuators. While the deployment of IoT brings value in various aspects of our society, the lucrative reward from cyber-crimes also increases in the upcoming IoT era. Two unique privacy and security concerns are emerging for IoT. On one hand, IoT brings a large volume of new sensors that are deployed ubiquitously and collect data 24/7. User's privacy is a big concern in this circumstance because collected sensor data may be used to infer a user's private activities. On the other hand, cyber-attacks now harm not only cyberspace but also the physical world. A failure in IoT devices could result in loss of human life. For example, a remotely hacked vehicle could shut down its engine on the highway regardless of the driver's operation. Our approach to emerging privacy and security concerns consists of two directions. The first direction targets at privacy protection. We first look at the privacy impact of upcoming ubiquitous sensing and argue for stricter access control on smart devices. Then, we follow the data flow of private data and propose solutions to protect private data from the networking and cloud computing infrastructure. The other direction aims at protecting the physical world. We propose an innovative method to verify the cyber state of IoT devices.
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Aranda-Mena, Guillermo. "Mapping workers' cognitive structures of construction site hazards." Thesis, University of Reading, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400021.

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Paterson, Ruth Elizabeth. "Development and evaluation of a theoretical model to predict medicines adherence in people with mild to moderate intellectual disability and diabetes : a mixed methods study." Thesis, Edinburgh Napier University, 2018. http://researchrepository.napier.ac.uk/Output/1526669.

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Background: Fifty percent of medications are not taken as prescribed. This is a major public health issue yet there is very limited evidence on the factors associated with medicines adherence in people with mild to moderate Intellectually Disabilities and diabetes (IDD). This study evaluated the frequency of, and factors associated with, medicines non-adherence in this group compared to people without ID but with diabetes (non-IDD).Methods: A systematic review of the literature informed the theoretical model tested. A two-stage, sequential mixed methods study with 111 people with type 1 and 2 diabetes, (IDD = 33, non-IDD = 78) was then carried out. Stage one (quantitative) compared frequency of medication adherence in the group overall, IDD and non-IDD. Univariate and multiple regression analysis evaluated associations between factors (ID, depression, side effects, self-efficacy and perceived level of social support) and medicines non-adherence. Stage two (qualitative) explored findings of stage one with 12 stage one participants' carers using semi-structured interviews. Results: Data were collected between July 2014 and May 2016. The frequency of medicines adherence was similar in the IDD and non-IDD population (70% vs 62%, p = 0.41). The theoretical model did not predict medicines non-adherence. After controlling for support with medicines and complexity of regime (number of medications and use of insulin), depression was an independent predictor in the non-IDD and group overall (p < 0.001). In the IDD group, perceived side effects was an important, but non-significant, predictor of non-adherence (p = 0.06). Carers' perceptions of adherence and depression were consistent with stage one findings. Conclusions: Optimising adherence to diabetes medicines is equally challenging in IDD and non-IDD populations. Associations between independent factors and adherence differed between the two groups: in the non-IDD population, depressive symptoms were associated with non-adherence whereas in the IDD population perceived level of side effects appeared most dominant. Due to small sample sizes findings were inconclusive therefore, a sufficiently powered study further investigating the relationship between adherence and side effects in people with ID and diabetes is recommended.
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Park, Kyeong M. "Boundary conditions of font size effects." Thesis, The University of Alabama in Huntsville, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10130786.

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<p> Prior research has shown that people perceive items in a larger font size as being more memorable than items in a smaller font size. This perception leads to higher judgments of learning (JOLs; i.e., confidence ratings regarding the likelihood of recalling an item) for larger font size items than smaller font size items. Yet other research has shown that people recalled more when the information was presented in a smaller font than when it was presented in a larger font size. The present study examined if there are boundary conditions of font sizes affecting JOLs and actual recall performance. As we expected, the results show that JOLs increased as a function of the size category. The results also show that font size impacted recall performance such that items in the Smallest size category were recalled at a higher rate than items in the other three font size categories.</p>
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Szostak, Natalia Maria. "Negative body image and cognitive biases to body size." Thesis, University of Hull, 2018. http://hydra.hull.ac.uk/resources/hull:16444.

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This thesis explored the relationship between cognitive biases to body size and one’s developed levels of body image concerns and weight status. Women with higher body image concerns were hypothesised to process body-related information in a biased fashion, specifically, to choose thin body ideals and rate thinner bodies higher on attractiveness, display an attentional bias towards thin bodies, and to estimate their own body size inaccurately. In study 1 (N = 84), although an attentional bias to thin bodies was not found, a positive thinness bias in young females was identified and related to one’s level of body image concerns. In study 2 (N = 61), an even more pronounced positive thinness bias was identified in a female sample with average to high levels of body image concerns. The study provided evidence that this bias can be successfully modified and that shifting the interpretation of body size can result in less extreme attitudes towards body size and improve one’s negative body image. Study 3 showed that a positive attitude towards thin female bodies exists in both young men (N = 67) and women (N = 67), but the choice of attractiveness ideals is related to one’s body image only when judging the bodies of one’s own gender. Study 4 (N = 87) indicated that regardless of one’s weight status, women higher in body image concerns present a greater discrepancy between their estimated and ideal size. However, the magnitude of one’s body size underestimation and inaccuracy in judging the amount of weight one would need to lose to achieve their body ideal was related to body image concerns for overweight and obese, but not normal weight women. Overall, the results show that cognitive body biases exist in young women and are related to one’s body image concerns and weight status.
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Oto, Mert Can. "Energy-efficient Packet Size Optimization For Cognitive Radio Sensor Networks." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613040/index.pdf.

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Cognitive Radio (CR) has emerged as the key technology to enable dynamic spectrum access. Capabilities of CR can meet the unique requirements of many wireless networks. Hence, Cognitive Radio Sensor Networks (CRSN) is introduced as a promising solution to address the unique challenges of Wireless Sensor Networks (WSN) which have been widely used for reliable event detection for many applications. However, there exist many open research issues for the realization of CRSN. Among others, determination of optimal packet size for CRSN is one of the most fundamental problems to be addressed. The existing optimal packet size solutions devised for CR networks as well as WSN are not applicable in CRSN regime and would cause a waste of energy resources. Hence, the objective of this thesis is to determine the optimal packet size for CRSN that maximizes energy-efficiency while maintaining acceptable interference level for licensed primary users (PU) and remaining under the maximum allowed distortion level between tracked event signal and its estimation at sink. Energy-efficient packet size reduces energy consumption and increases the transmission efficiency for CRSN. In this thesis, the energy-efficient packet size optimization problem is analytically formulated. Then, sequential quadratic programming (SQP) method is used for solving the optimization problem. The variation of optimal packet size with respect to different parameters of CRSN network is observed through numerical analysis. Results reveal that PU behavior and channel bit error rate (BER) are the most critical parameters in determining energy-efficient optimal packet size for CRSN.
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Konkle, Talia (Talia A. ). "The role of real-world size in object representation." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68421.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 117-128).<br>Every object in the world has a physical size which is intrinsic to how we interact with it: we pick up small objects like coins with our fingers, we throw footballs and swing tennis rackets, we orient our body to bigger objects like chairs and tables and we navigate with respect to landmarks like fountains and buildings. Here I argue that the size of objects in the world is a basic property of object representation with both behavioral and neural consequences. Specifically, I suggest that objects have a canonical visual size based on their real-world size (Chapter 2), and that we automatically access real-world size information when we recognize an object (Chapter 3). Further, I present evidence that there are neural consequences of realworld size for the large-scale organization of object knowledge in ventral visual cortex (Chapter 4). Specifically, there are regions with differential selectivity for big and small objects, that span from along the dorsal and lateral surfaces of occipito-temporal cortex in a mirrored organization. Finally, I suggest that the empirical findings can be coherently explained by thinking about the experience of an observer situated in a three-dimensional world. This work provides testable predictions about retinal size biases in visual experience, and an approach in which to understand the neural representation of any object in the world.<br>by Talia Konkle.<br>Ph.D.
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Travancinha, Joana Dias Nobre Paiva. "Alterações comportamentais sugestivas de síndrome da disfunção cognitiva em cães geriátricos." Master's thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2015. http://hdl.handle.net/10400.5/7862.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>A Síndrome da Disfunção Cognitiva Canina (DCC) é uma alteração neurodegenerativa que afeta cães geriátricos. É caracterizada por um declínio progressivo na função cognitiva do animal, que resulta em défices de aprendizagem, memória e de percepção espacial e alterações nos padrões de sono e interação social. Este estudo teve como objetivo estimar a prevalência de DCC em cães de idade igual ou superior a 7 anos e avaliar: i) a frequência de demonstração de sinais de DCC; ii) a sua relação com a idade, sexo e porte do animal, ingestão de dieta específica para cães geriátricos e a execução de atividades estimulantes; iii) a percepção da DCC pelos donos. Foram efetuados 100 inquéritos presenciais a proprietários de cães de idade igual ou superior a 7 anos (n=57 fêmeas, n= 43 machos) através da aplicação de um questionário dividido em: Parte I (identificação); Parte II (alterações comportamentais, adaptado de Rofina et al., 2006); Parte III (informações adicionais); Parte IV (dieta); Parte V (percepção do dono) e Parte VI (frequência de atividades estimulantes). Os dados da parte II do questionário foram utilizados num sistema de classificação consoante o grau de disfunção cognitiva, descrito por Fast et al. (2013). Os cães cujo score obtido foi de 10 foram incluídos no grupo sem DCC, os com score entre 11 e 15 no grupo de DCC borderline e os com score superior a 15 no grupo de DCC. Aos animais do grupo DCC foi realizada uma avaliação clínica e neurológica de modo a avaliar a existência de co-morbilidades confundíveis com o quadro de disfunção cognitiva. Foram excluídos 5 animais ou por impossibilidade de realização da avaliação clínica ou por co-morbilidade associada. Dos 95 cães da amostra final, 20% foram incluídos no grupo DCC, 69% no de DCC borderline e 11% no grupo sem DCC. As alterações mais frequentemente observadas na população em estudo, incidiram sobre a interação/atividade (24%) e o ciclo de sono/vigília (22%). Através de uma análise de regressão linear, demonstrou-se uma relação significativa entre a idade e o score (P <0,01), corroborando a ideia de que a DCC é um processo influenciado pelo avançar da idade. Já o porte, o sexo e a ingestão de dieta sénior não demonstraram relação com o score. Verificou-se que, a maioria dos proprietários de cães com DCC não valorizava as alterações comportamentais, associando-as a um fenómeno natural de envelhecimento (68%). O resultado de uma análise de regressão linear simples sugere que o estímulo cognitivo, através de jogos e brincadeiras frequentes com o animal, pode ter influência no atraso do processo de DCC (P <0,1).<br>ABSTRACT - Behavioral changes suggestive of cognitive dysfunction syndrome in geriatric dogs - Canine Cognitive Dysfunction Syndrome (CCD) is a neurodegenerative process that affects geriatric dogs. It is characterized by a progressive decline in cognitive function, resulting in deficits in learning, memory and spatial perception as well as in changes in sleep patterns and social interaction. This study aimed mainly at determining the prevalence of CCD in 7 year old or older dogs and evaluate: i) the frequency in which CCD signs was displayed; ii) the possible relationship between the manifestation of CCD and the age, sex and size, specific diet for geriatric dogs and the execution of stimulating activities; iii) the owners perception of CCD. 100 surveys were made to owners of 7 year old or older dogs (n=57 female, n= 43 male) through the application of a questionnaire divided as follows: Part I (identification); Part II (behavioral changes, adapted from Rofina et al, 2006); Part III (additional information); Part IV (diet); Part V (perception of the owner) and Part VI (frequency of stimulating activities). The data of Part II of the questionnaire were used in a classification system according to the degree of cognitive dysfunction, described by Fast et al. (2013). The animals whose score was 10 were included in the group Without CCD, those with the score between 11 and 15 were included in the group of borderline CCD and those with score above 15, in the group of CCD. A clinical and neurological evaluation was performed to the animals of CCD group to evaluate the existence of co-morbidities confusable with the clinical picture of cognitive dysfunction. 5 animals were excluded due to the impossibility of carrying out the clinical evaluation or due to the presence of co-morbidities. Of the 95 selected geriatric dogs, 20% were included in the CCD group, 69% in the CCD borderline, with slight behavioral changes, and 11% in the Without DCC group. The most frequently observed changes in the study population were focused on the interaction/activity (24%) and the day/night rhythm (22%). Using a linear regression analysis, a relationship between age and the score obtained has been clearly demonstrated (P<0,01), supporting the idea that the CCD is a process influenced by advancing age. However, the size, sex and intake of senior diet didn’t show relationship with the score. It was found that most owners did not value the behavioral changes, linking them to the natural phenomenon of ageing (68%). The result of a simple linear regression analysis suggest that cognitive stimulation through games and frequent playing with the dog may have influence on the delay or prevention of the CCD process (P <0,1).
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Saeedi, Hasti. "Extended Cognition and Brain-Bound Cognition: Exploring Both Sides of the Debate." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/27783.

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In this thesis, I address the question of where the disagreement between extended cognition theorists and intracranialists stems from. To lay out the state of the dialectic in the debate, Chapter 1 is dedicated to spelling out what the extended cognition view involves and reasons for supporting it. Chapter 2 is dedicated to spelling out what the intracranialist view involves and reasons for supporting it against extended cognition. In Chapter 3, I introduce my view, theoretical contextualism, as a two-dimensional framework that I claim should be used to characterise the debate, such that the reason there is a disagreement between the parties is because of their internal, theoretical contexts. In short, the parties are psychologically the same in regards to primary intension of ‘cognition’, yet are psychologically different in regards to secondary intension. In Chapter 4, I explore the potential explanatory virtues of the two views, and claim that they are views which are not incompatible with one another. Rather, I claim, under the framework of explanatory holism, that they are perhaps equally useful explanations for cognition, insofar as proponents of each party are asking distinct, worthwhile questions, with different answers given their different theoretical contexts. I explore whether the two different models of cognition pick out different natural kinds, and suggest that the question of whether cognition extends should be replaced by the question of which kind we should prefer, relative to a particular theoretical context. I conclude by suggesting that future research into extended cognition and intracranialism steer away from which view is determinedly correct, and toward what explanatory virtues they have in service of cognitive science. I claim this, because I ultimately think that the different questions and answers pertaining to the parties can play an important role in coming to a holistic, rich understanding of cognition as a whole.
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Chambost, Isabelle. "CONTRIBUTION À L'ANALYSE DE LA FORMATION DU JUGEMENT DES ANALYSTES FINANCIERS SELL-SIDE." Phd thesis, Conservatoire national des arts et metiers - CNAM, 2007. http://tel.archives-ouvertes.fr/tel-00212330.

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Fortement critiqués à la suite des avatars de la « nouvelle économie », les analystes financiers sell-side, salariés des sociétés de courtage, représentent néanmoins des acteurs indispensables et incontournables, tant pour les directions d'entreprise que pour les investisseurs. Cette recherche a pour vocation d'essayer de comprendre comment les analystes financiers sell-side forment leur jugement. La première partie de cette thèse montre comment les recherches antérieurement réalisées en finance ainsi qu'en comptabilité, selon l'appréhension du futur qu'elles retiennent, ont étudié ce phénomène en intégrant progressivement l'inscription sociale de l'analyste. Cette dimension sert de point de départ pour une démarche compréhensive et qualitative, fondée sur la méthode de la Grounded Theory. La seconde partie propose un modèle d'analyse de la formation du jugement en tant que pratique institutionnellement encadrée et localement ajustée. Cette recherche montre comment l'inscription de l'analyste au sein de son « champ organisationnel » le conduit à devoir prendre en compte les modes de raisonnement et à interagir cognitivement avec les autres acteurs.
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Riveros, Rivera Andre J. "Body Size and the Neural, Cognitive and Sensory Basis of Sociality in Bees." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/145712.

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Body size is a universal property affecting biological structure and function, from cell metabolism to animal behavior. The nervous system, the physical generator of behavior, is also affected by variations in body size; hence potentially affecting the way animals perceive, interpret and react to the environment. When animals join to form groups, such individual differences become part of the structure of the society, even determining social roles. Here, I explore the association between body size, behavior and social organization in honeybees and bumblebees. Focusing on bumblebees, I explore the link between body size, brain allometry and learning and memory performance, within the context of task specialization. I show that body size goes along with brain size and with learning and memory performance, and that foraging experience affects such cognitive and neural features. Next, I explore the association between body size and foraging task specialization in honeybees. Previous evidence showed a link between specialization on pollen or nectar foraging and sensory sensitivity, further associating sensitivity to the quality and/or quantity of resource exploited. I hypothesize that, as in solitary bees, larger body size is associated with higher sensory sensitivity. I test this hypothesis by comparing body size and the quality and quantity of the resource exploited by wild Africanized and European honeybees. I show that nectar foragers are smaller and have fewer olfactory sensilla, which might underlie their lower sensitivity to odors. Also, larger bees collect more pollen (within pollen foragers) and more dilute nectar (within nectar foragers). To further test this `size hypothesis', I compare strains of bees selected to store large ("high strain") or small ("low strain") amounts of pollen surplus. As these strains differ in sensory sensitivity, I predict that the more sensitive high strain bees are larger and have more sensory sensilla. I show that high strain bees are generally bigger, but have fewer sensory sensilla than low strain bees. These results show that in bees, body size is associated with an individual's sensory, neural and cognitive features, further suggesting that body size plays a more important role in the organization of bee societies than generally assumed.
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Cançado, Mariana Figueira Lopes. "Psicoterapia por internet para dependentes de álcool de um site especializado: viabilidade, aceitabilidade e resultados clínicos iniciais." Universidade Federal de Juiz de Fora (UFJF), 2017. https://repositorio.ufjf.br/jspui/handle/ufjf/5662.

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Submitted by isabela.moljf@hotmail.com (isabela.moljf@hotmail.com) on 2017-08-22T13:28:33Z No. of bitstreams: 1 marinafiqueiralopescançado.pdf: 1089501 bytes, checksum: 825ad490c7a233802c70894b30e9c29a (MD5)<br>Rejected by Adriana Oliveira (adriana.oliveira@ufjf.edu.br), reason: on 2017-08-24T11:33:27Z (GMT)<br>Submitted by isabela.moljf@hotmail.com (isabela.moljf@hotmail.com) on 2017-08-24T14:06:42Z No. of bitstreams: 0<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-08-30T12:39:28Z (GMT) No. of bitstreams: 0<br>Made available in DSpace on 2017-08-30T12:39:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-02-03<br>CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Apesar do consumo problemático de álcool ser um problema de saúde pública a busca por tratamento é pequena e a oferta de serviços especializados é insuficiente. Nos últimos anos cresceu o número de ofertas de tratamentos online para diferentes transtornos, incluindo o problemas com o uso de álcool. Este estudo teve como objetivo avaliar a viabilidade e aceitabilidade de uma psicoterapia online para dependentes de álcool e descrever os resultados clínicos iniciais. Para isso foi realizado um estudo piloto com os participantes com uso sugestivo de dependência cadastrados no site www.informalcool.org.br/bebermenos. Os convites foram realizados por e-mail e a psicoterapia proposta foi feita inteiramente por videoconferência. Observamos que entre o cadastramento e a realização da psicoterapia existem algumas etapas de perda. Foi feita a descrição dos participantes em cada etapa para melhor compreensão do perfil dos mesmos. Observou-se que o perfil prevalente para esta intervenção entre todas as etapas do recrutamento e da psicoterapia por internet foi homens, empregados, com alta escolaridade, em estágio de contemplação para mudança do comportamento de beber, com uma média de idade entre 37 e 41,3 anos e pontuação no teste AUDIT entre 22,7 e 26,0. Nenhum dos participantes da psicoterapia online havia se tratado anteriormente para o seu uso de álcool. Encontrou-se que a taxa de resposta aos e-mails convite para a psicoterapia por internet foi de 28,2%, e todos os participantes elegíveis convidados para participar aceitaram iniciar o tratamento, confirmando aceitabilidade. Dos 12 pacientes que iniciaram a psicoterapia 6 finalizaram. Houve redução no número de doses consumidas, de 9,6 doses para 3 doses por ocasião e aumento na quantidade de dias abstinente, de 14 dias para 21,3 dias. Consideramos que a amostra neste estudo apresentou boa aceitabilidade a proposta de psicoterapia por internet, ainda que se apresentem taxas de perda, uma vez que estas existem em estudos clínicos e em psicoterapia. Consideramos viável a realização de um ensaio clínico para avaliar a eficácia e efetividade da psicoterapia por internet.<br>Although problematic alcohol consumption is a public health problem, the search for treatment is small and the supply of specialized services is insufficient. In recent years there has been an increase in the number of online treatments for different disorders, including alcohol use disorders. This study aimed to evaluate the viability and acceptability of an online psychotherapy for alcohol dependents and to describe the initial clinical results. For this, a pilot study was carried out with the participants with suggestive use of dependence registered in the site www.informalcool.org.br/bebermenos. The invitations were made by e-mail and the proposed psychotherapy was done entirely by videoconference. We observe that between the registration and the accomplishment of the psychotherapy there are some stages of loss. The participants were described at each stage to better understand their profile. It was observed that the prevalent profile for this intervention between all stages of recruitment and internet psychotherapy was men, employed, with high schooling, in contemplation readiness to change drinking behavior, with a mean age between 37 and 41.3 years and AUDIT score between 22.7 and 26.0. None of the participants in online psychotherapy had previously treated themselves for their alcohol use. It was found that the response rate to e-mail invitations to online psychotherapy was 28.2%, and all eligible participants invited to attend agreed to initiate treatment, confirming acceptability. Of the 12 patients who started psychotherapy six finalized. There was a reduction in the number of standard drinks consumed, from 9.6 drinks to 3 drinks per occasion and an increase in the number of days abstinent, from 14 days to 21.3 days. We consider that the sample in this study presented a good acceptability to the proposal of psychotherapy delivered by Internet, even though there are rates of loss, since these exist in clinical studies and in psychotherapy. We consider it feasible to conduct a clinical trial to evaluate the efficacy and effectiveness of online psychotherapy.
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22

Pate, Shari Ann. "Web tools: An aid for cognitive learning." CSUSB ScholarWorks, 2004. https://scholarworks.lib.csusb.edu/etd-project/2777.

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The purpose of this project is to provide students and teachers with a disk of tools to aide in the development of Web pages either in the classroom or through online (distance education) learning. Many of the tools supplied on this disk have been field tested in a high school Web design class. When students are allowed to be creative and are able to fuse interesting visual displays the results can be significant in increasing cognitive and multiple intelligences skills.
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23

Bundsen, Andreas. "Artificial selection for large and small relative brain size in guppies (Poecilia reticulata) results in differences in cognitive ability." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-192953.

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Vertebrate brain size is remarkably variable at all taxonomic levels. Brains of mammals forexample, range from 0.1 gram in small bats (Chiroptera) to about 8-9 kilos in Sperm whales(Physeter macrocephalus). But what does this variation in size really mean? The link between brainsize and cognition is debated due to, for instance the difficulties of comparing cognitive ability indifferent species. A large number of comparative studies continue to provide information aboutcorrelations found both within and between species. The relative size of the brain is an example of apopular measurement that correlates with cognitive ability. But to date, no experimental studieshave yielded any proof causality between relative brain size and cognitive ability. Here I usedguppies selected for either large or small relative brain size to investigate differences in cognitiveperformance of a quantity discrimination task. The results from this experiment provideexperimental evidence that relative brain size is important for cognitive ability, and that a differencein cognitive ability could be obtained already after two generations of selection experiments onrelative brain size in a vertebrate.<br>Artificial Selection on Relative Brain Size in the Guppy Reveals Costs and benefits of Evolving a Larger Brain
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24

Rahman, Oarisur, and Shrikant Balakrishnan. "Cognitive Effects of Acute Exercise in Healthy Young Adults : A Meta-Analysis." Thesis, Högskolan Dalarna, Mikrodataanalys, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:du-34433.

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Although, it is well established that regular exercise has a positive effect on various domains of cognitive functions, effects of a single session (acute) exercise on cognitive functions of an young adult is under debate. While a numbers of research have found positive associations between acute exercise and cognitive performance, multiple research have found no effect of acute exercise on the cognitive functions. There are also evidences that suggest that acute exercise reduces brain function of healthy young adults. This thesis took on a meta-analytical approach to determine the effect of a single session exercise on the cognitive functions of healthy young adults, and metaregression analyses were performed to identify the moderators that may influence the effect of acute exercise on cognitive functions of healthy young adults. After a comprehensive electronic search 59 experimental studies were found to be eligible for inclusions based on the pre-specified criteria. Results indicated that acute exercise has a small but significant effect on the cognitive functions of healthy young adults. However, larger effects are possible for particular cognitive outcomes (reaction time), when specific exercise parameters are used (5 minutes of exercise duration, moderate intensity exercise), and when specific assessment task is used (visual span board task, and serial subtraction of 7). The overall findings of this study is consistent with previous research. However, more research is needed to get a clear understanding of the acute exercise effect moderators.
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25

Mueller, Michael. "THE FONT-SIZE EFFECT ON JUDGMENTS OF LEARNING: DOES IT EXEMPLIFY THE EFFECT OF FLUENCY ON JOLS OR REFLECT PEOPLE'S BELIEFS ABOUT MEMORY?" Kent State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=kent1379950901.

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26

Mahatody, Thomas. "Spécification et conception d’un environnement d’aide à l’inspection des Systèmes Interactifs, basé sur la méthode Cognitive Walkthrough." Valenciennes, 2010. http://ged.univ-valenciennes.fr/nuxeo/site/esupversions/acd7f7bf-f5fa-46cc-bb9c-2f35bf3f4b41.

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Cette thèse s’intéresse à l’évaluation des systèmes interactifs. Elle vise à contribuer à l’extension et à l’outillage de la méthode Cognitive Walkthrough. Cette méthode a fait l’objet de nombreuses études et expérimentations au niveau international. Elle a aussi conduit à plusieurs modifications et extensions. Malgré l’intérêt que suscite la méthode, son utilisation pose de nombreux problèmes aussi bien méthodologiques qu’applicatifs. Dans un premier temps, cette thèse décrit les éléments clés liées à la prise en compte des facteurs humains dans la conception et l’évaluation des systèmes interactifs. Puis, elle propose un état de l’art sur l’évaluation des systèmes interactifs basée sur la méthode Cognitive Walkthrough. Ensuite la spécification d’un environnement d’aide à l’inspection des systèmes interactifs basé sur la méthode Cognitive Walkthrough est décrite. Une maquette de l’environnement dénommé CWE (« Cognitive Walkthrough Environment ») est proposée ; elle a fait l’objet d’une première évaluation. Une conclusion et des perspectives terminent le mémoire<br>This thesis is focused on the evaluation of interactive systems. It aims to contribute to the extension and equipment of the Cognitive Walkthrough method. This method is the subject of many studies and experiments worldwide. It has also undergone several modifications and extensions. Despite the interest in the method, its use poses many methodological and applicative problems. Firstly, this thesis describes the key elements related to human factors consideration in interactive system design and evaluation. Then, it proposes a state of the art on the evaluation of interactive systems based on the Cognitive Walkthrough method. Then the specification of an environment to support the inspection of interactive systems based on Cognitive Walkthrough is described. A mockup of an environment called CWE ("Cognitive Walkthrough Environment") is proposed; a first evaluation is exposed. A conclusion and perspectives end the thesis
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Yu, Bing. "Cognitive and educational outcomes of being born small-for-gestational-age : A longitudinal study based on Stockholm Birth Cohort." Thesis, Stockholms universitet, Centrum för forskning om ojämlikhet i hälsa (CHESS), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-131759.

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The aim of this study is to examine the long-term cognitive effects and educational outcomes of being born small-for-gestational-age (SGA). It also assesses whether the family’s attitude towards education modifies the effect of SGA on cognitive performance. A total of 9598 children born in 1953 and living in the Stockholm metropolitan area in 1963 were included in this study. Data were obtained from the Stockholm Birth Cohort. Multiple ordinary least square regressions analyses suggest that SGA children have lower mean verbal, spatial and numerical test scores than appropriate-for-gestational-age (AGA) children. However, these differences are small. Other results from modification analyses indicate that the effect of SGA status on cognitive performance is modified by the family’s attitude towards education. Additional logistic regression analyses suggest that the unadjusted difference in log odds of attaining higher education is largely explained by the family’s attitude towards education. The results suggest that the detrimental influences of being born SGA on some cognitive and educational outcomes are limited and may be reduced.
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28

Bask, Nina, and Anna Bäckström. "Effects of preterm birth : Associations between brain volumes, neuropsychological functioning, and side preference in school age children." Thesis, Umeå universitet, Institutionen för psykologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-71655.

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A preterm birth is associated with increased risk for neurocognitive deficits, but there is a need to further investigate brain/behavior relations among younger school age children born preterm. The main purpose of this study was to investigate relations between brain volumes and neuropsychological functioning, with an additional aim of examining side preference, among 18 school age children, nine born extremely/very preterm and nine born at-term. Brain volumes were examined using 3T MRI, neuropsychological functioning by WISC-IV and side preference through laterality observations. The children born preterm had, in general lower total brain volume, gray matter and WISC-IV score. Contrary to previous findings no difference was found regarding white matter volumes. Stronger right hand preference was associated to higher perceptual reasoning ability among both preterm and at-term born children, but the associations between right hand preference and brain volumes differed between the groups. The results in this study support previous findings showing long-term neurocognitive effects of a preterm birth.
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29

Smith, Jason. "The Human Side of Change: Towards a Pragmatic, Evolutionary Conception of Cognition and Emotion in Organizational Change." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1864.

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This dissertation synthesizes and analyzes an emblematic sample of three prevalent psychological approaches to organizational change and learning, giving particular attention to the conception of cognition and emotion. It also explores some of the philosophical and psychological assumptions undergirding these approaches. A web model depicting various epistemological influences is offered as a tool for exploring influences on the psychological research within and beyond this study. A second conceptual model is also offered as a tool for considering the hierarchical treatment and preferential placement of cognition over emotion theory and practice. The project draws on general philosophy, psychology, evolutionary theory, and multiple other disciplines in the effort to understand why cognition is afforded a hallowed place while emotion is treated as an unruly subject. Dewey’s experiential, evolutionary psychology of emotion is repositioned as an alternative to what might be considered a Jamesian depiction of the relationship between cognition and emotion. Some of the implications of Dewey’s pragmatic reading and application of Darwinian naturalism are explored to raise awareness of the way that various interests are served through the rigid classification of human experience. Finally, an organizational fable is offered to help connect the project to the genuine problems that the reader brings to the text.
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30

Warner, William. "The Relationship Between Law Enforcement Agency Size and Police Stress." ScholarWorks, 2018. https://scholarworks.waldenu.edu/dissertations/5955.

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Researchers have found that law enforcement officers often experience stress. The purpose of this quantitative study was to determine if the size of the law enforcement agency (small, medium, or large) had any significant influence on how police officers perceive stress in their profession from a cognitive appraisal perspective with regards to Administrative/Organizational Pressure, Physical/Psychological Threats, and Lack of Support. Members of law enforcement (N = 144) from Utah and New York were surveyed utilizing Spielberger et al.'s Police Stress Survey. Archival data were provided by the National Police Suicide Foundation. Stress index scores were calculated manually for each survey completed, and then 3 separate ANOVAs were conducted to test the hypothesis. The results showed that officers from medium-sized departments perceive greater amounts of stress than those in large or small departments in the area of administrative/organizational pressure, while officers from large police departments perceived greater amounts of stress than their counterparts in small and medium-sized agencies in the areas of physical/psychological threats and lack of support. This study has implications for positive social change: understanding the stressors that police officer's face each day can help forensic psychologists understand the methods necessary to repair the strained relationship between the community and members of law enforcement; understanding the stressors can also open a pathway for researchers to begin the process of developing more a productive dialogue between police officers, their departmental leaders, and the communities they protect, which should begin during the early phases of academy training.
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31

Corral, López Alberto. "The link between brain size, cognitive ability, mate choice and sexual behaviour in the guppy (Poecilia reticulata)." Doctoral thesis, Stockholms universitet, Zoologiska institutionen, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-148547.

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Competition over access for mates has led to the evolution of many striking examples of morphological traits and behaviour in animals. The rapid development of the sexual selection field in recent decades have dramatically advanced our understanding of what traits make individuals more successful in attracting mates and how preferences for mates evolve over time. However, till now, research in this field has put less emphasis on the mechanisms that underlie variation in mate choice and sexual behaviour. Cognitive processes could potentially be key drivers of individual variation in mating preferences and sexual behaviours and therefore deserve further investigation. In this thesis, I used guppies artificially selected for relative brain size as the model system to study the association between brain size, cognitive ability and various aspects of mate choice. Previous studies in this model system showed that large-brained individuals of both sexes outperformed small-brained individuals in cognitive tests. Here I quantified their sexual behaviours and mating preferences to provide novel empirical data concerning the association between brain size, cognitive ability and sexual selection. In dichotomous choice preference tests based on visual cues, comparisons between large-brained and small-brained guppies showed important differences in their assessment of mate quality. These results are not driven by pre-existing visual biases caused by the artificial selection since further investigation of the visual capacity of these fish detected no differences between large-brained and small-brained individuals in their sensitivity to colour or in their capacity to resolve spatial detail. I also quantified sexual behaviour in male guppies artificially selected for relative brain size and found no difference in the behaviours of large-brained and small-brained males in a single male-single female non-competitive scenario. On the contrary, in a more complex social setting I found a reduction in large-brained males in the rate of courtship towards females and dominance displays towards other males when exposed to different degrees of predation threat and different numbers of male competitors. However, this reduction in behavioural intensity did not result in a lower access to copulation with females for large-brained males. I likewise evaluated female sexual behaviour and found that large-brained females had higher behavioural flexibility such that they decreased their receptiveness towards males more strongly under higher levels of predation threat. Together, these results provide novel empirical evidence that brain size and cognitive ability are tightly linked to mating preferences and sexual behaviours. These findings suggest that brain size and cognitive ability might be important mechanisms behind variation in mating preferences and in sexually selected traits across and within species.<br><p>At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: Manuscript. Paper 3: Manuscript. Paper 5: Manuscript.</p>
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32

Boffo, Marilisa. "Implicit measurement at the service of mental health: assessment and intervention as the two sides of the same coin." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423753.

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Scientific research in psychology is intrinsically bound to the measurement of variables that are per nature highly complex, changeable, and most often unobservable. The design of measurement methods is mostly focused on the attempt to capture the main features of the psychological attribute of interest. The last fifteen years have seen a massive development and use of a new set of measurement instruments that go under the name of implicit measures, which accomplishes the primary goal of indexing psychological attributes interchangeably defined as automatic, uncontrollable, unconscious, impulsive, or implicit. The primary goal of the present work was to explore the implicitness feature of implicit measures and their functioning. The research covered the experimentation of several implicit measures in two different contexts within the broader domain of mental health: the automatic components of stigmatizing attitudes and behaviours towards people affected by a mental disease (Part 1) and the impulsive, automatic processes implied within people affected by a mental disease, more specifically, by an alcohol addiction disorder (Part 2). Part 1 of this dissertation is concerned with the design of two Implicit Association Tests targeting two aspects of mental illness stigma, namely, aetiological beliefs and prejudicial attitudes. The main objectives were to verify whether these two measures could be used as assessment techniques in this particular framework and to explore the plausible existence of implicit complements of mental illness stigma. Part 2 doubled the perspective of this research by experimenting implicit measurement techniques as means for change by adapting them to retrain the implicit processes they were initially designed to assess. The study took the form of a Randomised Clinical Trial with alcohol addict outpatients in which the combination of two training paradigms targeting maladaptive impulsive processes towards alcohol (i.e., attentional bias and approach bias) is examined. In both studies, the measurement properties of the implicit measures developed and their meaning in relation to the theoretical to-be-measured psychological attributes have been explored within a Rasch modelling perspective, through the application of the Many-Facet Rasch Measurement (MFRM) model. In Part 1, the MFRM model allowed disentangling the different ‘ingredients’ contributing to the emergence of the IATs effect and highlighting how implicit aetiological beliefs and evaluative associations with mental illness are multifaceted aspects. Semantic and evaluative implicit associations with mental illness resulted to be dependent on diagnostic categories and differently determined by biologic semantic associations and by a positive association primacy, respectively. Further, the MFRM evidenced the functioning of the IAT at the microscopic level. In Part 2, analysis of data of a group of participants at pre- and post-intervention assessment sessions evidenced the first promising results of the RCT: although participants did not show a substantial change in their alcohol attentional and approach bias measures, the MFRM showed a changing process in action. Experimental conditions showed to have a differential effect in bringing in a decrease and/or a reversal of the two cognitive biases. The MFRM contributed to the exploration of the dimensional and theoretical status of the two cognitive bias implicit measures and provided informative clues about their general and domain- specific features. Further, the MFRM retrieved first evidence about a differential effect of the stimuli used in improving control processes over the impulsive reactions towards alcohol. The intertwined elements of this work, namely, implicit measurement, mental health, and Rasch modelling, have been combined in the attempt not only to clarify the benefits of implicit methods in psychology, but also to unravel what it actually means to use implicit measures. The combination with a rigorous modelling approach indeed demonstrated both the limitations and the strength of this new family of instruments.<br>La ricerca scientifica in psicologia è intrinsecamente legata alla misurazione di variabili che per natura sono mutevoli, presentano un’elevata complessità e molto spesso non sono direttamente osservabili. Lo sviluppo di metodi di misurazione è funzionale alla ricerca di un mezzo per mettere in luce le diverse sfaccettature della variabile psicologica di interesse. Gli ultimi quindici anni hanno assistito ad un enorme sviluppo e applicazione di un nuovo insieme di strumenti di misura note come misure implicite, le quali hanno come scopo primario quello di quantificare quelle variabili psicologiche definite come automatiche, incontrollabili, inconsce, impulsive, o implicite. L’obiettivo principale di questo lavoro è stato quello di esplorare la natura propriamente implicita di alcune di queste misure, insieme al loro funzionamento. Il progetto di ricerca ha incluso la sperimentazione di alcuni metodi di misura impliciti in due diversi contesti all’interno del più ampio ambito della salute mentale: da una parte lo studio delle componenti automatiche nei processi di stigmatizzazione nei confronti di persone affette da un qualche disturbo mentale (Parte 1); dall’altra la considerazione dei processi impulsivi e automatici in persone affette da uno specific disturbo mentale, quale la dipendenza dal alcol (Parte 2). La Parte 1 della tesi include lo sviluppo di due Implicit Association Tests destinati alla valutazione di due aspetti inerenti lo stigma verso la malattia mentale: le credenze eziologiche e gli atteggiamenti pregiudiziali. Gli obiettivi principali hanno riguardato la verifica del possibile utilizzo di queste misure come strumenti di valutazione in questo specifico ambito, e nel contempo dell’effettiva esistenza di una controparte implicita nell’espressione dello stigma verso la malattia mentale. Nella Parte 2 la prospettiva ha assunto un’ulteriore duplice veste attraverso la sperimentazione delle tecniche di misurazione implicita come strumenti di cambiamento, attraverso il loro adattamento alla funzione di training di quei processi impliciti inizialmente misurati. Lo studio ha preso la forma di un Trial Clinico Randomizzato (TCR) con pazienti ambulatoriali dipendenti da alcol, nel quale è valutata la somministrazione di una combinazione di due training per il trattamento dei processi cognitivi automatici disfunzionali (i.e., bias attentivo e di approccio) implicati nella dipendenza da alcol. In entrambi gli studi sono state esplorate sia le proprietà misurative degli strumenti sviluppati, sia la loro relazione con l’ipotetica variabile psicologica misurata all’interno di una prospettiva di modellazione a tratti latenti, attraverso l’applicazione del Many-Facet Rasch Measurement model (MFRM). I risultati ottenuti nella Parte 1 mostrano come il modello MFRM sia riuscito a separare i diversi ‘ingredienti’ che contribuiscono all’emergere dell’effetto IAT evidenziando come le credenze eziologiche implicite e l’atteggiamento implicito nei confronti della malattia mentale siano multi-sfaccettati. Le associazioni semantiche e valutative nei confronti della malattia mentale sembrano cambiare in funzione della categoria diagnostica e sono rispettivamente determinate da associazioni con l’area semantica biologica e da un effetto primacy di associazioni positive. Il modello MFRM ha inoltre reso evidente il funzionamento dello IAT a livello microscopico. Nella Parte 2, l’analisi di un gruppo di partecipanti nelle sessioni di pre- e post- assessment ha dato i primi, promettenti risultanti sull’efficacia del TCR: nonostante al momento i partecipanti non abbiamo menifestato un significativo cambiamento nelle misure del bias attentivo e di approccio verso l’alcol, il modello MFRM ha dimostrato comunque che c’è effettivamente in atto un processo di cambiamento. Le condizioni sperimentali hanno prodotto un effetto discriminante nell’ottenere la diminuzione o il rovesciamento dei due bias cognitivi. Il modello ha inoltre contribuito all’esplorazione della dimensionalità e delle ipotesi teoriche alla base delle due misure implicite dei bias, dando suggerimenti rilevanti circa le loro caratteristiche dominio-generali e dominio-specifiche. Un ulteriore risultato riguarda un primo riscontro di un effetto esercitato dagli stimoli utilizzati nelle due misure nell’aumentare i processi di controllo degli impulsi nei confronti dell’alcol. In conclusione, l’intreccio tra misurazione implicita, salute mentale, e modelli di Rasch è nato allo scopo non solo di chiarire i benefici dell’utilizzo delle misure implicite in psicologia, ma anche per svelare che cosa significa effettivamente la misurazione implicita, mostrando sia i limiti che i punti di forza di questa nuova famiglia di strumenti attraverso la combinazione con un approccio metodologico e modellistico rigoroso.
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33

Anderson, Peter M. "Encephalization in Commensal Raccoons: A Unique Test of the Cognitive Buffer Hypothesis." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/etd/3720.

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This study investigated selective pressures associated with encephalization in mammals and discussed broader implications. Relative brain size as measured by EQ (Encephalization Quotient) was compared between ecological categories. Omnivores had higher average EQ than ecological specialists. Since specialists are disproportionately affected by extinction events, selection for ecological generalism is proposed as encephalization mechanism. This mechanism may reinforce the more widely known Cognitive Buffer Hypothesis (CBH)—the idea that possessing relatively large brains has buffered lineages against environmental change. CBH is tested here by comparing EQs in Procyon lotor (raccoon) in urban and rural environments. CBH predicts that raccoons in the most radically altered environment, the city, experience the strongest selection for encephalization. Urban raccoons studied here exhibit a higher EQ. Although results are preliminary, data suggest that encephalization is accelerated during abrupt periods of environmental change. Finally, implications for the evolution of biological complexity more generally are discussed.
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34

Ozer, Gabriela. "From Both Sides of the Desk: The Understanding and Application of Individual Learning Styles." Scholarship @ Claremont, 2015. http://scholarship.claremont.edu/cmc_theses/1043.

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The learning style theories, specifically the styles of auditory, visual, and kinesthetic, can have a significant influence on boosting the overall academic performance of students across the globe. The purpose of this paper is to demonstrate the qualities and implications of each style, whether positive or negative, on the individual achievement of each learner. Although much evidence has pointed to the importance of its application in the classroom, there has been research on the significance of other factors, such as neurological aspects, external influences, and controllable disciplinary actions. There is still much research to be done in regards to educational development, but one important takeaway for practice is the ability of an individual to realize their learning style in the classroom, ultimately allowing for the successful translation into various actions on daily life.
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Lemoine, Marie-Pierre. "Coopération hommes-machines dans les procédés complexes : Modèles techniques et cognitifs pour le contrôle de trafic aérien." Valenciennes, 1998. https://ged.uphf.fr/nuxeo/site/esupversions/0821b192-7376-49d6-ba14-abc99ab0917a.

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La coopération est un point de rencontre de nombreuses disciplines. L'automatique décrit la coopération homme-machine au travers des outils d'assistance qu'elle est capable de développer. Les sciences humaines l'étudient au travers du comportement en milieu collectif. Cette thèse s'inscrit dans ce courant pluridisciplinaire et propose des critères et des moyens pour concevoir des systèmes d'aide qui répondent aux exigences tant humaines qu'industrielles. La répartition dynamique de taches entre un opérateur humain et un système d'aide, est une forme de coopération qui permet de couvrir une vaste plage de l'activité de supervision et de contrôle de procédés complexes. Ce mémoire en donne un exemple puisque la recherche s'applique au contrôle de trafic aérien. Compte tenu du foisonnement de définitions de la coopération, notre recherche tente de recentrer les points de vue éparses et propose une synthèse en fonction des notions de savoir-faire et de savoir-coopérer. La description des agents coopératifs en fonction de ces notions facilite la recherche des lacunes dans l'organisation des agents, ainsi que dans les tâches qui leur sont affectées. Une méthodologie d'évaluation est notamment présentée. Elle s'appuie sur un modèle cognitif de l'opérateur humain, et des critères de performance pondérés par des critères sur la qualité de la coopération. L'une des solutions proposées a l'issue des expérimentations est la conception d'un espace de travail commun. En plus d'une interface homme-machine, il est muni de modules intelligents qui facilitent ou automatisent l'identification des plans des agents coopératifs. Le système d'aide dispose alors de données précises et objectives pour piloter le répartiteur et l'allocateur de tâches. Un exemple d'espace de travail commun est présenté, il répond a l'augmentation du trafic aérien en apportant un soutien actif à la coopération entre les contrôleurs aériens, les pilotes, et les systèmes d'aide.
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Slavich, George Michael. "Cognitive mechanisms of stress sensitization /." view abstract or download file of text, 2006. http://proquest.umi.com/pqdweb?did=1188882951&sid=1&Fmt=2&clientId=11238&RQT=309&VName=PQD.

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Thesis (Ph. D.)--University of Oregon, 2006.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 129-143). Also available for download via the World Wide Web; free to University of Oregon users.
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Guerra, Enriquez Guillermo José. "Factores conductuales y cognitivos asociados al riesgo de contraer VIH en un grupo de HSH." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/9892.

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La presente investigación buscó describir los factores conductuales (conductas sexuales de riesgo) y factores cognitivos (conocimientos, actitudes negativas y positivas, susceptibilidad y autoeficacia percibida) asociados al contagio del VIH en un grupo de 56 hombres que tienen sexo con otros hombres (HSH). Ellos asisten a una ONG en Lima, con edades entre 20 y 54 años (DE= 29.95). Para el objetivo, se usó parte del Cuestionario Confidencial de Vida Sexual Activa (CCVSA) desarrollado por el Ministerio de Salud de Colombia con la colaboración de la Organización Panamericana de la Salud (OPS) (1997) y el VIH-65 (Bermúdez, Buela-Casal y Uribe, 2005). Se encontró que el 89% de los participantes reportan conductas de riesgo para la práctica de sexo oral, otro 61% con el sexo anal, 50% con el sexo vaginal y el 46% presentó una ITS en el último año. Los altos índices de incidencia en este tipo de conductas, anales y orales, son alarmantes ya que estos ponen en riesgo la salud con respecto al VIH. Por otro lado, se encontró niveles adecuados de conocimientos correctos, autoeficacia y actitudes frente a aspectos relacionados al VIH y a personas con dicha condición. Sin embargo, las escalas de susceptibilidad percibida; autoeficacia y actitudes negativas, mostraron índices de consistencia interna muy bajos por lo que no se pudieron incorporar al análisis de correlación luego de realizadas las pruebas de confiabilidad. No se hallaron correlaciones entre las conductas de riesgo y el nivel de conocimientos, ideas erróneas o las actitudes positivas en la muestra. Se discute la necesidad de realizar más investigaciones y de desarrollar y/o adaptar instrumentos más específicos a las poblaciones con las que se pretende trabajar.<br>This research sought to describe behavioral (risky sexual behavior) and cognitive factors (knowledge, positive and negative attitudes, susceptibility and perceived self-efficacy) associated to the infection of HIV in a group of 56 men that have sex with other men (MSM). They attend an NGO in Lima, and their ages range between 20 and 54 years (M= 29.95). The Confidential Active Sexual Life Questionnaire (CCVSA) developed by the Colombian Ministry of Health with the collaboration of the Pan American Health Organization (PAHO) (1997) and HIV-65 (Bermudez, Buela-Casal and Uribe, 2005) were used to reach this objective. It was found that 89% showed risk behaviors in oral sex, another 61% had risk in anal sex, 50% in vaginal sex and 46% identified an STD in the last year. These high incidence rates in this type of behavior are alarming and put these people's health at risk with respect to HIV/AIDS. On the other hand, accurate levels of knowledge, self-efficacy and attitudes were found. The need for more research is discussed, as well the development and/or adaptation of more accurate instruments.<br>Tesis
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Taze, Sophie. "LA FORMATION RELATIONNELLE DES OPINIONS. Etude des opinions des jeunes relatives au sida dans des situations d'hétérogénéité cognitive." Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2007. http://tel.archives-ouvertes.fr/tel-00236974.

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Ces dernières années, la question du sida s'est progressivement déplacée. Avec l'introduction des nouveaux traitements en 1996, le contexte thérapeutique s'est transformé, suscitant des changements de la perception de la maladie et de sa gravité accompagnés d'une reprise des comportements à risques, particulièrement visibles dans la génération « post-sida ». Dans ce contexte de dédramatisation, comment les acteurs parviennent-ils à se former une opinion sur un certain nombre d'aspects de la maladie ?<br />Mobilisant un paradigme structural, la thèse vise à comprendre la manière dont les structures de différents réseaux de discussion et d'échanges d'informations produisent différents types de confrontations cognitives et normatives, qui permettent que des représentations soient stabilisées ou au contraire modifiées.<br />Mais il est fréquent qu'un acteur appartienne à des réseaux porteurs de représentations hétérogènes. Ceci peut conduire un même acteur à partager des pensées différentes sur le même objet.<br />Une méthode originale a été élaborée pour enregistrer les convergences et divergences des opinons entre un acteur et deux interlocuteurs successifs différents. A chaque fois, l'acteur et l'interlocuteur répondaient en vis-à-vis aux mêmes séries de questions. L'étude montre les caractéristiques des relations qui pèsent sur la convergence des opinions, la fréquence des contextes relationnels hétérogènes et la manière dont des acteurs changent d'opinion selon ces contextes.<br />Au-delà des sociologies de l'influence ou de la diffusion des innovations, cette approche éclaire quelques processus cognitifs propres aux systèmes relationnels où sont élaborés des savoirs profanes partagés.
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Breeze, Julian. "Task switching and cognitive control processes : measured using increases to stimulus dimension, stimulus set size and task practice." Thesis, Bangor University, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494186.

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The aim of this thesis is to understand some of the processes involved in the selection of appropriate tasks, and in the selection of correct responses to those tasks. The main focus of the following experiments will be on how interference and conflict occurs during these processes, either at the perceptual or action selection stages when switching task. It should be possible to demonstrate with increases to the number of attributes, the experience of tasks associated with non-target attributes, and in varying the number of trials before switching tasks, that task selection consists of several stages or processes, and that these processes do not necessarily interact. This will show that the switch cost is not an unitary cost associated with changing a single response-stimulus setting, task parameter, or an overall task set, but a composite of various costs associated with different task selection processes.
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40

Tazé, Sophie. "La formation relationnelle des opinions : étude des opinions des jeunes relatives au sida dans des situations d'hétérogénéité cognitive." Lille 1, 2007. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2007/50377-2007-3.pdf.

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Ces dernières années, la question du sida s'est progressivement déplacée. Avec l'introduction des nouveaux traitements en 1996, le contexte thérapeutique s'est transformé, suscitant des changements de la perception de la maladie et de sa gravité accompagnés d'une reprise des comportements à risques, particulièrement visibles dans la génération « post-sida ». Dans ce contexte de dédramatisation, comment les acteurs parviennent-ils à se former une opinion sur un certain nombre d'aspects de la maladie? Mobilisant un paradigme structural, la thèse vise à comprendre la manière dont les structures de différents réseaux de discussion et d'échanges d'informations produisent différents types de confrontations cognitives et normatives, qui permettent que des représentations soient stabilisées ou au contraire modifiées. Mais il est fréquent qu'un acteur appartienne à des réseaux porteurs de représentations hétérogènes. Ceci peut conduire un même acteur à partager des pensées différentes sur le même objet. Une méthode originale a été élaborée pour enregistrer les convergences et divergences des opinons entre un acteur et deux interlocuteurs successifs différents. A chaque fois, l'acteur et l'interlocuteur répondaient en vis-à-vis aux mêmes séries de questions. L'étude montre les caractéristiques des relations qui pèsent sur la convergence des opinions, la fréquence des contextes relationnels hétérogènes et la manière dont des acteurs changent d'opinion selon ces contextes. Au-delà des sociologies de l'influence ou de la diffusion des innovations, cette approche éclaire quelques processus cognitifs propres aux systèmes relationnels où sont élaborés des savoirs profanes partagés.
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41

Penke, Lars. "Neuroscientific approaches to general intelligence and cognitive ageing." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2011. http://dx.doi.org/10.18452/13979.

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Nach einem ausführlichem Überblick über den Kenntnisstand der Genetik und Neurowissenschaft von allgemeiner Intelligenz und einer methodischen Anmerkung zur Notwendigkeit der Berücksichtigung latenter Variablen in den kognitiven Neurowissenschaften am Beispiel einer Reanalyse publizierter Ergebnisse wir das am besten etablierte Gehirnkorrelat der Intelligenz, die Gehirngröße, aus evolutionsgenetischer Perspektive neu betrachtet. Schätzungen des Koeffizienten additiv-genetischer deuten an, dass es keine rezente direktionale Selektion auf Gehirngröße gegeben hat, was ihre Validität als Proxy für Intelligenz in evolutionären Studien in Frage stellt. Stattdessen deuten Korrelationen der Gesichtssymmetrie älterer Männer mit Intelligenz und Informationsverarbeitungsgeschwindigkeit an, dass organismusweite Entwicklungsstabilität eine wichtige Grundlage von unterschieden in kognitiven Fähigkeiten sein könnte. Im zweiten Teil dieser Arbeit geht es vornehmlich um die Alterung kognitiver Fähigkeiten, beginnend mit einem allgemeinen Überblick. Daten einer Stichprobe von über 130 Individuen zeigen dann, dass die Integrität verschiedener Nervenbahnen im Gehirn hoch korreliert, was die Extraktion eines Generalfaktors der Traktintegrität erlaubt, der mit Informationsverarbeitungsgeschwindigkeit korreliert. Der einzige Trakt mit schwacher Ladung auf diesem Generalfaktor ist das Splenium des Corpus Callosum, welches mit Veränderungen der Intelligenz über 6 Jahrzehnte korreliert und den Effekt des Bet2 adrenergischem Rezeptorgens (ADRB2) auf diese Veränderung mediiert, möglicherweise durch Effekte auf neuronale Komopensationsprozesse. Schließlich wird auf Basis neuer Analyseverfahren für Magnetresonanzdaten gezeigt, dass vermehrte Eiseneinlagerungen im Gehirn, vermutlich Marker für zerebrale Mikroblutungen, sowohl mit lebenslang stabilen Intelligenzunterschieden als auch mit der altersbedingten Veränderung kognitiver Fähigkeiten assoziiert sind.<br>After an extensive review of what is known about the genetics and neuroscience of general intelligence and a methodological note emphasising the necessity to consider latent variables in cognitive neuroscience studies, exemplified by a re-analysis of published results, the most well-established brain correlate of intelligence, brain size, is revisited from an evolutionary genetic perspective. Estimates of the coefficient of additive genetic variation in brain size suggest that there was no recent directional selection on brain size, questioning its validity as a proxy for intelligence in evolutionary analyses. Instead, correlations of facial fluctuating asymmetry with intelligence and information processing speed in old men suggest that organism-wide developmental stability might be an important cause of individual differences in cognitive ability. The second half of the thesis focuses on cognitive ageing, beginning with a general review. In a sample of over 130 subjects it has then been found that the integrity of different white matter tracts in the brain is highly correlated, allowing for the extraction of a general factor of white matter tract integrity, which is correlated with information processing speed. The only tract not loading highly on this general factor is the splenium of the corpus callosum, which is correlated with changes in intelligence over 6 decades and mediates the effect of the beta2 adrenergic receptor gene (ADRB2) on cognitive ageing, possibly due to its involvement in neuronal compensation processes. Finally, using a novel analytic method for magnetic resonance data, it is shown that more iron depositions in the brain, presumably markers of a history of cerebral microbleeds, are associated with both lifelong-stable intelligence differences and age-related decline in cognitive functioning.
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42

Hodgson, Eric P. "Spatial Updating and Set Size: Evidence for Long-Term Memory Reconstruction." Connect to this document online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1119967948.

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Thesis (M.A.)--Miami University, Dept. of Psychology, 2005.<br>Title from first page of PDF document. Document formatted into pages; contains [1], iv, 35 p. : ill. Includes bibliographical references (p. 32-35).
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43

Le, Forner Hélène. "Human capital inequalities : family structure matters." Thesis, Paris 1, 2019. http://www.theses.fr/2019PA01E039/document.

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Ces dernières décennies, la famille a connu des changements majeurs dans la majorité des pays de l’OCDE. D’une part, le taux de fertilité a baissé ; d’autre part, le nombre de séparation a fortement augmenté. Cette thèse se propose d’étudier les effets de ces changements de la structure familiale sur le capital humain des individus, en l’envisageant comme une nouvelle source d’inégalités. Dans un cadre micro-économique, cette thèse mobilise les outils économétriques pour les appliquer à de larges bases de données. Les trois chapitres de cette thèse présentent des résultats nouveaux sur l’effet de la séparation parentale et de la taille de la famille sur le capital humain de l’individu. Le premier chapitre porte sur l’effet de la séparation parentale en France sur la réussite professionnelle des individus, et montre un effet négatif de la séparation parentale sur le niveau d’étude et la position sociale de l’individu. En s’appuyant sur des données américaines, le second chapitre s’intéresse aux mécanismes expliquant cet effet, et en particulier, sur les changements du temps passé avec les parents. Ainsi, 30% de l’effet de la séparation parentale sur le développement socio-émotionnel des enfants serait expliqué par la baisse du temps passé avec au moins un parent présent. Le troisième chapitre considère un autre aspect de la structure familiale : la taille de la famille. Nous trouvons que l’arrivée d’un troisième enfant dans la famille diminue les compétences socio-émotionnelles des autres enfants, en particulier chez les filles<br>Family has known great transformations in the last decades in a large number of OECD countries. On one hand, fertility rates have decreased. On the other hand, the number of separations has increased sharply. This thesis asks whether these major changes of family structure affect child’s human capital, being a new source of inequalities. Using very large datasets and micro-econometric methods, the three chapters present original empirical evidence on whether parental separation and family size impact individual’s human capital. The first chapter studies the effect of parental separation in France on individual’s achievement, and find a negative effect of parental separation on individual’s educational attainment and social position. Using an American dataset, the second chapter asks whether this effect is driven by changes in time spent with parents, and find that 30% of the effect of parental separation on socio-emotional skills is explained by the decrease in time spent with at least one parent present. The third chapter accounts for another aspect of family structure: the number of children. Using a British dataset, we find that having a second sibling in the United Kingdom decreases the child’s socio-emotional skills, especially for girls
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Butcher, Lee Matthew. "Towards genomewide association using applications of DNA pooling to locate QTLs of small effect size for general cognitive ability." Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434999.

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45

Magazzini, Lorenzo. "Quality control of visual gamma oscillation frequency in studies of pharmacology, cognitive neuroscience and large-scale multi-site collaborations." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/98613/.

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In visual cortex, high-contrast grating stimuli induce neurons to oscillate synchronously with a centre frequency in the gamma range (~30–80 Hz). The peak frequency of visual gamma oscillations is modulated by numerous factors, including stimulus properties, cortical architecture and genetics, however, it can be measured reliably over time. As demonstrated by both animal models and human pharmacological studies, the gamma peak frequency is determined by the excitation/inhibition balance and the time constants of GABAergic processes. This oscillatory parameter could thus reflect inter-individual differences in cortical function/physiology, representing a possible biomarker for pharmacological treatment in conditions such as epilepsy, autism and schizophrenia. This thesis demonstrates the importance of measuring the gamma peak frequency accurately and reliably in magnetoencephalographic (MEG) recordings. In Chapter 2, a novel quality-control (QC) approach was validated for peak frequency estimation and identification of poor-quality data. In Chapter 3, QC of a previous pharmacological MEG study of visual gamma with tiagabine revealed a marked drug-induced reduction of peak frequency. Although contrasting with the null finding originally reported (Muthukumaraswamy et al., 2013), the result is supported by both animal models and recent human studies, demonstrating the potentialities of appropriate QC routines. In Chapter 4, testing for the effect of spatial attention on the gamma peak frequency in primary visual cortex resulted in no evidence of a change. However, the modulation of gamma amplitude by attention was consistent with a role in feed-forward signal propagation across the visual hierarchy. In Chapter 5, the QC approach was used to compare visual gamma data recorded at different sites of the UK MEG Partnership, demonstrating the feasibility of combining data from different MEG systems. These results have implications particularly for pharmacological and large-scale multi-site studies, both of which are emerging as promising approaches for the study of brain function with MEG.
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46

Vilensky, Michael. "Fear as a Magnifying Glass: The Relationship Between Fear Intensity and Size Perception." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1329237590.

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47

Veena, Sargoor. "Cognitive performance during childhood and early adolescence in India : relationships to birth size, maternal nutrition during pregnancy and postnatal growth." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/385138/.

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48

Langley, Ellis Jessica Grace. "The causes and consequences of individual differences in cognitive performances in relation to the social environment in pheasants." Thesis, University of Exeter, 2018. http://hdl.handle.net/10871/34376.

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Identifying the causes and consequences of intra-specific variation in cognitive abilities is fundamental to our understanding of the evolution of cognition. The social environment and cognitive abilities appear inextricably linked, yet evidence for how the social environment affects cognitive performances and further, how cognitive performances influence the social environment, has seldom been explored. Using the pheasant, Phasianus colchicus, I explore the relationships between individual variation in cognitive performances in relation to broad and fine-scale structure of the social environment and endeavour to separate cause and consequence. I demonstrate a positive causal effect of the broad-scale social environment on cognitive performances by observing increases in the accuracy of spatial discrimination performances when individuals are in larger groups (Chapter Two and Chapter Four). I show that the positive effects of larger group size occur over a relatively short period (less than one week), suggesting that cognitive performances are flexible in response to the social environment and I suggest four potential mechanisms. I show that while males are part of a social hierarchy, spatial discrimination performances are related to this fine-scale social structure and higher-ranking males outperform lower ranking males (Chapter Three). When attempting to determine cause and consequence, I found that spatial learning performances early in life did not predict adult cognitive performances on the same task or predict their adult social rank (Chapter Four). Hence, my results do not support that social rank is a consequence of spatial learning abilities in male pheasants. The relationship between spatial learning performances and social rank was found in adult males that had their social rank artificially elevated, suggesting that cognitive performances were not simply the result of the current social environment but remain closely related to past agonistic relationships. I did not find a relationship between early life aggression with performances on either a spatial or a non-spatial task in females or males (Chapter Five). This highlights the importance of investigating early life relationships and suggests that the relationship between spatial learning and aggression in adult males may become associated over time as a consequence of further spatial learning experiences, and, or, aggressive interactions. I then demonstrate a consequence of individual variation in cognitive abilities and show that adult foraging associations in the wild disassort by early life cognitive performances (Chapter Six). Individuals with good inhibitory control performance and poor visual discrimination performances were more central in social networks. I propose that differences in cognitive abilities manifest in foraging strategy and influence the resulting social structure. The implications of this predictable social structure remain to be explored. Finally, I discuss these results and how they contribute to our understanding of how the social environment causes individual differences in cognitive performances, as well as how variation in cognitive performances may shape the social environment. I suggest the potential implications of these findings and ideas for future work.
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Holmgren, Sara. "Effects of family configuration on cognitive functions and health across the adult life span." Doctoral thesis, Umeå : Department of Psychology, Umeå University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1446.

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Johansson, Anna-Maria. "Sensorimotor behavior in children born preterm and adolescents with Cerebral Palsy : Side preference, movement organization, and training." Doctoral thesis, Umeå universitet, Institutionen för psykologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-60871.

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Preterm birth (&lt; 37 complete gestation weeks, GWs) is the single most prominent risk factor for the development of cerebral palsy (CP). This is due to the immature physiological state of the preterm born infant which increases the risk of brain lesions. In CP, prominent sensorimotor, cognitive, and perceptual deviations are manifested with varying degrees of functional impairment. Although most children born preterm (PT) do not develop CP, sensorimotor and cognitive deficits are frequently reported in the absence of major disability. To date, few studies have focused on detailed kinematic analysis of upper-body goal-directed movements and how aspects of movement organization and control are related to hand preference, intellectual function, gestational age, and sex within groups of prematurely born children. Further, studies evaluating effects of sensorimotor training in persons with CP is needed and of importance as positive effects on movement performance may increase individual autonomy as a consequence.To investigate the prevalence of non-right hand preference within children born preterm (PT) in comparison to children born fullterm (FT), a meta-analysis and literature review were performed (study I). It was shown that children born PT had increased rates of non-right handedness (NRH) corresponding to 22% compared to 12% in the FT group (odds ratio 2.12). In study II, hand preference and side specific movement performance in children born PT (. 35 GWs) compared to an age matched group of children born FT were investigated. All included participants were 4-8 years of age without major disability. Movement performance was studied through detailed kinematic registrations of the head, arm, and hand during a goal-directed task and hand preference through observations of the hand used when manipulating different objects. On a group level, the children born PT, specifically those born &lt; 33 GWs, showed an increased rate of NRH, weaker strength of hand preference, and a lack of side specificity in terms of movement kinematics. In general, the children born &lt; 33 GWs also displayed poorer movement organization and control as expressed by longer durations, less smooth and longer distances of the movement trajectories. These findings imply that preterm birth has long term effects on sensorimoror organization and function, possibly reflecting a developmental delay and/or a persistent effect that may be associated with the increased risk of deviations in brain development.In study III, associations between movement performance, assessed with the same task as in study II, and intellectual function (Wechsler Intelligence Scale for Children, 4th ed; WISC-IV) were studied. This study included a subsample of the children from study II at 6-8 years of age. The results showed a link between movement organization and general intellectual functioning (IQ), when controlling for effects of GA and sex, for the PT born but not the FT born children. These findings suggest shared neural underpinnings and interrelated development of motor and intellectual functions.In study IV, kinematic analysis of upper-body movements and subjective experience of change in upper-body function were applied before and after a period of synchronized metronome training (SMT) in adolescents with varying degree of CP to study the effects of this type of training. The SMT method applied entailed elements of movement timing and rhythmic activation coupled with feedback and was hypothesized to train sensorimotor integration. It was found that SMT did improve, to varying degrees, the organization and control of movements in adolescents with CP. The participants with more severe forms of CP reported substantial effects in daily living activities. The observed effects of SMT warrant further study of specific effects on movement planning, biomechanical constraints, and attention.The relation between hand preference and movement performance, movement performance and intellectual function, and aspects related to the SMT method applied in study IV are discussed. Specifically, the lack of side specific movement organization within the group of children born PT is discussed from perspectives of motor learning, plasticity, and genetics. The relations between movement performance and intellectual functions are considered and ideas for how this association could be tested are given. With relation to study IV, the functions trained by the specific SMT method applied and the accessibility of individuals with different degree of CP is discussed. Methodological considerations and ideas for future research approaches within these areas are presented.<br>Varje år föds det drygt 100 000 barn i Sverige. Cirka 5% av dessa barn föds för tidigt, det vill säga före 37 kompletta graviditetsveckor. Av de barn som föds för tidigt har majoriteten en gestationsålder (antalet graviditetsveckor) över 33 veckor (Medicinska födelseregistret, 2009). Omkring 8% av barn som föds för tidigt diagnosticeras senare med cerebral pares (CP) (Ancel, et al., 2006) och omkring hälften av personer med diagnosen CP har en för tidig födelsehistorik (Beaino et al., 2010). CP är ett paraplybegrepp som innefattar ett flertal icke-progressiva motoriska utvecklingsavvikelser av olika karaktär och funktionsnedsättningsgrad, orsakade av hjärnskador som inträffar under fosterlivet eller vid förlossningen. Vanligtvis så påverkas även sensorik, perception, kognition, och beteende negativt (Rosenbaum, Paneth, Leviton, Goldstein, &amp; Bax, 2008). En prematur födsel utgör den största riskfaktorn för utvecklingen av CP där risken är störst för de barn som föds allra tidigast (Murphy, Sellers, MacKenzie, Yudkin, &amp; Johnson, 1995). De allra flesta barn som föds för tidigt drabbas dock inte av grav sensomotorisk funktionsnedsättning som till exempel CP trots att det finns en ökad risk för hjärnskador hos denna grupp. Ett flertal studier har ändå visat att barn som fötts för tidigt och ej diagnosticerats med CP i högre grad än fullgångna barn generellt har både motoriska (e.g., Williams et al., 2010) och kognitiva (e.g., Bhutta, 2002) funktionsnedsättningar.I dagsläget så har endast ett fåtal studier fokuserat på att i detalj studera organiseringen av målinriktade hand-armrörelser hos barn som fötts för tidigt. Av dessa har merparten fokuserat på spädbarn i syfte att finna tidiga markörer för sensomotoriska avvikelser. Då de sensomotoriska problemen hos för tidigt födda barn kvarstår i skolåldern och i vissa fall är så diskreta att de upptäcks först när barnet börjar skolan så kan rörelseanalys vara en metod som kan bidra till ökad förståelse och kunskap om hur den sensomotoriska påverkan uttrycks hos äldre barn. Ett av syftena med denna avhandling var således att noggrant studera organiseringen av huvud-, arm-, och handrörelser under en målinriktad handling hos barn som fötts för tidigt jämfört med en grupp barn i samma åldrar (4-8 år) som fötts efter fullgången graviditet. Av intresse är att studera relationen mellan aspekter associerade med rörelseorganisation och handpreferens, intellektuell förmåga, gestationsålder, samt kön. Då barn och ungdomar med CP utgör den största diagnosgruppen som behandlas inom barn- och ungdomshabiliteringar (Odding, Roebroeck, &amp; Stam, 2006) finns det ett stort behov av att utvärdera effekten av redan existerande träningsmetoder. Ett ytterligare syfte med detta avhandlingsarbete var att utvärdera både kort- och långtidseffekter av en etablerad träningsmetod (synchronized metronome training; SMT) som antas främja den sensomotoriska integreringen hos ungdomar (12-17 år) med diagnosen CP. Effekterna av denna träningsmetod utvärderades med hjälp av detaljerad rörelseanalys samt ett frågeformulär gällande individens upplevelse av förändring.Då barn som fötts för tidigt i vissa studier har visat sig ha en ökad prevalens av icke-högerhänthet, det vill säga fler som är vänsterhänta eller tvåhänta (ambidextra), så utfördes en systematisk litteraturgenomgång och en metaanalys för att undersöka detta fenomen närmare (studie I). I denna studie visade det sig att barn som fötts för tidigt i större utsträckning var icke-högerhänta jämfört med barn som fötts efter en fullgången graviditet (odds ratio 2.12). Hos de för tidigt födda barnen var 22% icke högerhänta jämfört med 12% av de som fötts efter fullgången graviditet. Dock säger handpreferensstudier inget om hur kvaliteten på rörelser utförda med den föredragna eller icke-föredragna handen ser ut. För att undersöka sambandet mellan handpreferens och kvalitet på rörelser kopplade till den föredragna och icke-föredragna handen hos barn som fötts för tidigt, jämfört med fullgångna åldersmatchade kontroller, utfördes kinematiska rörelseanalyser samt ett testbatteri som undersöker handpreferens (studie II). Barnen utförde målinriktade rörelser, med en hand i taget, i en uppgift som ställer höga krav på öga-hand-koordination och precision. Uppgiften bestod i att plocka upp och trä så många pärlor som möjligt på en smal pinne under 30 sekunder. Denna studie visade att barnen med en för tidig födelsehistorik, speciellt de mycket för tidigt födda (före graviditetsvecka 33), i större utsträckning var klassificerade som icke-högerhänta och hade en svagare handpreferens i jämförelse med barnen som inte fötts för tidigt. De mycket för tidigt födda barnen visade även, som grupp, en sämre organisering av huvud-, arm-, och handrörelser vilket manifesterades i en ökad längd, tidsåtgång och ojämnhet av rörelsebanorna. Oavsett gestationsålder så visade den för tidigt födda gruppen barn inga sidoskillnader i kvaliteten på rörelserna vilket däremot var tydligt hos gruppen barn som fötts vid fullgången graviditet. Dock så skiljde sig gruppen barn som fötts moderat för tidigt (mellan graviditetsvecka 33 och 35) inte statistiskt signifikant åt från barnen i den fullgånget födda gruppen. Dessa resultat indikerar en långvarig effekt av för tidig födsel på sensomotorisk funktion. Den markanta påverkan som barnen som fötts före graviditetsvecka 33 uppvisade, kan tolkas som en effekt av den ökade risken för avvikelser i hjärnans utveckling.I studie III undersöktes sambanden mellan intellektuell förmåga och organiseringen av rörelser hos barn som fötts för tidigt samt hos barn som fötts efter en fullgången graviditet i 6-8 års ålder (en subgrupp ur studie II). Den intellektuella förmågan undersöktes med hjälp av Wechsler Intelligence Scale for Children, 4:e upplagan, och den kinematiska uppgiften var den samma som beskrivits ovan. Denna studie visade på skillnader i intellektuell förmåga, specifikt gällande generell intelligens samt verbal och perceptuell förmåga, där de för tidigt födda barnen hade lägre poäng än de fullgångna barnen. Viktigt att poängtera är dock att medelvärdena för gruppen för tidigt födda barn låg inom det normala spannet. Vidare så visade sig gestationsålder och generell intellektuell förmåga ha betydelse för det motoriska utförandet hos de för tidigt födda barnen, speciellt på den föredragna sidan. Kön bidrog inte till att förklara skillnader i organiseringen av rörelser. Intellektuell förmåga hade ingen relation till den sensomotoriska funktionen hos gruppen barn som fötts efter en fullgången graviditet. Detta belyser vikten av att studera kognitiva aspekter av motorisk funktion för att bättre förstå de skillnader eller avvikelser som ofta påvisas hos barn med en för tidig födelsehistorik. Dessutom skulle en sådan ansats öka kunskapen om den interrelaterade utvecklingen av motorisk och intellektuell förmåga, både ur ett beteendeperspektiv och ur ett hjärnutvecklingsperspektiv.Kinematisk rörelseanalys användes även i studie IV för att beskriva eventuella förändringar i rörelseorganisation efter SMT-träning hos ungdomar med olika typer av CP och varierande grad av funktionsnedsättning (studie IV). Ungdomarna utförde en målinriktad uppgift som bestod i att tända små lampor i sekventiell ordning. Testerna genomfördes vid tre tillfällen, före, i anslutning till avslutad SMT-träning samt 6 månader efter avslutad SMT-träning. Träningsperioden varade i 4 veckor och innefattade 12 individanpassade SMT-sessioner. Den typ av SMT-träning som användes i denna studie antas främja sensomotorisk integrering genom rytmisk aktivering och timing av rörelser mot en auditiv och visuell signal. Feedback på avvikelsen i synkronisering, och en instruktion om hur deltagaren skall uppnå bättre rörelsetiming, ges direkt både auditivt och visuellt. Denna studie visade på förändringar i rörelseorganisation och motorisk kontroll hos flertalet av deltagarna. Dessa effekter kvarstod till viss del vid uppföljningen efter 6 månader. Deltagarna med gravare funktionsnedsättning rapporterade substantiella förändringar i förmågan att delta i dagliga aktiviteter både direkt efter avslutad träning samt 6 månader senare. De rapporterade effekterna gällde ökad snabbhet, minskad muskeltonus, bättre arm-, hand- och fingerkontroll, samt ökad motivation att använda armen och handen både i träning och vardagliga aktiviteter. Dessa subjektivt upplevda förändringar tillsammans med de vi observerat i de kinematiska parametrarna utgör en grund för fortsatta studier av effekter av SMT hos denna grupp ungdomar och även hos andra grupper barn och ungdomar med motoriska problem. En ansats där effekter av SMT-metoder studeras utifrån rörelseplanering, biomekaniska restriktioner, samt uppmärksamhet skulle vara av betydelse.I avhandlingen diskuteras relationen mellan handpreferens och kvalitet på rörelser i relation till den föredragna och icke-föredragna handen, samband mellan organisering av rörelser och intellektuell förmåga, samt aspekter relaterade till SMT-metoden som applicerats i studie IV. Specifikt diskuteras avsaknaden av en sidospecifik rörelseorganisering hos gruppen barn som fötts för tidigt i relation till motorisk inlärning, hjärnans förmåga att förändra sig, och genetik. Relationen mellan organisering av rörelser och intellektuell förmåga betänks och förslag på hur detta samband kan undersökas i kommande studier ges. Vidare så diskuteras vilka funktioner som SMT-metoden tränar samt dess tillgänglighet för barn och ungdomar med olika grad av funktionsnedsättning relaterad till typ av CP diagnos. Metodologiska överväganden och idéer för framtida forskningsansatser inom dessa områden presenteras.<br><p>En viktig annan finansiär är Norrbacka-Eugenia Stiftelsen som bekostade hela min forskarutbildning.</p>
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