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Journal articles on the topic 'National IQ'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Meisenberg, Gerhard. "National IQ and economic outcomes." Personality and Individual Differences 53, no. 2 (2012): 103–7. http://dx.doi.org/10.1016/j.paid.2011.06.022.

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Saadat, M. "Consanguinity and national IQ scores." Journal of Epidemiology & Community Health 62, no. 6 (2008): 566–67. http://dx.doi.org/10.1136/jech.2007.069021.

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Grigoriev, Andrei A. "NATIONAL IQ AND INNOVATIONAL ACTIVITY OF A COUNTRY." Sibirskiy psikhologicheskiy zhurnal, no. 60 (June 1, 2016): 6–21. http://dx.doi.org/10.17223/17267080/60/1.

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Eysenck, William. "Personality, intelligence, and longevity: A cross-cultural perspective." Social Behavior and Personality: an international journal 37, no. 2 (2009): 149–54. http://dx.doi.org/10.2224/sbp.2009.37.2.149.

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Cross-cultural information about national IQ, national personality, and longevity was obtained. Longevity was positively associated with neuroticism and national IQ and negatively associated with conscientiousness and agreeableness. The negative effects were mediated by income inequality: low conscientiousness and agreeableness were associated with high income inequality (strongly associated with poor longevity). The effect of national IQ on longevity remained strong when GDP percapita, income inequality, and individualism were partialed out. This effect probably occurs in part because countri

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5

Shatz, Steven M. "IQ and fertility: A cross-national study." Intelligence 36, no. 2 (2008): 109–11. http://dx.doi.org/10.1016/j.intell.2007.03.002.

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Rajput, S., A. Hassiotis, M. Richards, S. L. Hatch, and R. Stewart. "Associations between IQ and common mental disorders: The 2000 British National Survey of Psychiatric Morbidity." European Psychiatry 26, no. 6 (2011): 390–95. http://dx.doi.org/10.1016/j.eurpsy.2010.07.002.

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AbstractBackgroundAssociations have been described between lower IQ and serious mental illness. Associations between common mental disorders (CMDs) and IQ have received little research. The objective of this study was to investigate the association between verbal IQ and CMD symptoms and diagnoses, and to investigate the role of potential mediating and confounding factors.MethodData were analysed from a British national survey with an analysed sample of 8054 people aged 16–74 years. Associations between verbal IQ (NART) and mental symptoms/disorders (CIS-R) were analysed with covariates includi

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7

Grigoriev, A. A., and E. M. Lapteva. "Intellectual competitiveness of a country: the problem of national IQ mediation." Experimental Psychology (Russia) 11, no. 3 (2018): 152–62. http://dx.doi.org/10.17759/exppsy.2018110311.

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The study investigates the link between intellectual competitiveness of a country with the national IQ — the evaluation of the intelligence of a population. The hypothesis about a mediation of this link by such variables as expenses for research, the number of specialists who conduct research, the patent index, is tested. The results indicate that expenses on research and number of specialists, conducting research, but not patent index, probably, mediate relation between national IQ with such indications of intellectual competitiveness as the share of a high technological production in export.

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8

VORACEK, MARTIN. "NATIONAL INTELLIGENCE, SUICIDE RATE IN THE ELDERLY, AND A THRESHOLD INTELLIGENCE FOR SUICIDALITY: AN ECOLOGICAL STUDY OF 48 EURASIAN COUNTRIES." Journal of Biosocial Science 37, no. 6 (2004): 721–40. http://dx.doi.org/10.1017/s0021932004006959.

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Across 85 countries around the world, Voracek (2004) found a significant positive relation between estimated national intelligence (IQ) and national male and female suicide rate. The relation was not attenuated when countries’ per capita Gross Domestic Product (GDP) and type of national IQ estimation were statistically controlled. Independently, investigating the total national suicide rate only, Lester (2003) arrived at the same conclusion. These two findings are consistent with a corollary of de Catanzaro’s (1981) evolutionary theory of human suicide, namely that a threshold intelligence is

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9

Voracek, Martin. "National Intelligence and Suicide Rate across Europe: An Alternative Test Using Educational Attainment Data." Psychological Reports 101, no. 2 (2007): 512–18. http://dx.doi.org/10.2466/pr0.101.2.512-518.

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National mean scores on a historical knowledge test (taken as a proxy for intelligence), stemming from representative samples of male (and female) 9th-grade school students from 26 European countries in a 1999 report by Wilberg and Lynn, were significantly positively associated with the national male (and female) suicide rates, independent of the general quality-of-living conditions in these countries. This finding replicates previous evidence from cross-national studies (by Lester and by Voracek), of a correspondence of higher national IQ to higher suicide rates, with an alternative measure o

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Jacob, Louis, Josep Maria Haro, and Ai Koyanagi. "Association between intelligence quotient and violence perpetration in the English general population." Psychological Medicine 49, no. 08 (2018): 1316–23. http://dx.doi.org/10.1017/s0033291718001939.

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AbstractBackgroundData on the relationship between intelligence quotient (IQ) and violence perpetration are scarce and nationally representative data from the UK adult population is lacking. Therefore, our goal was to examine the relationship between IQ and violence perpetration using nationally representative community-based data from the UK.MethodsWe analyzed cross-sectional data from the 2007 Adult Psychiatric Morbidity Survey. IQ was estimated using the National Adult Reading Test (NART). Violence perpetration referred to being in a physical fight or having deliberately hit anyone in the p

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11

Cernada, George. "Editorial: The Great First National Primary Debate." International Quarterly of Community Health Education 32, no. 1 (2012): 3–9. http://dx.doi.org/10.2190/iq.32.1.b.

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12

Lester, David. "National Estimates of IQ and Suicide and Homicide Rates." Perceptual and Motor Skills 97, no. 1 (2003): 206. http://dx.doi.org/10.2466/pms.2003.97.1.206.

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LESTER, DAVID. "NATIONAL ESTIMATES OF IQ AND SUICIDE AND HOMICIDE RATES." Perceptual and Motor Skills 97, no. 5 (2003): 206. http://dx.doi.org/10.2466/pms.97.5.206-206.

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14

Kendler, Kenneth S., Eric Turkheimer, Henrik Ohlsson, Jan Sundquist, and Kristina Sundquist. "Family environment and the malleability of cognitive ability: A Swedish national home-reared and adopted-away cosibling control study." Proceedings of the National Academy of Sciences 112, no. 15 (2015): 4612–17. http://dx.doi.org/10.1073/pnas.1417106112.

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Cognitive ability strongly aggregates in families, and prior twin and adoption studies have suggested that this is the result of both genetic and environmental factors. In this study, we used a powerful design—home-reared and adopted-away cosibling controls—to investigate the role of the rearing environment in cognitive ability. We identified, from a complete national Swedish sample of male–male siblings, 436 full-sibships in which at least one member was reared by one or more biological parents and the other by adoptive parents. IQ was measured at age 18–20 as part of the Swedish military ser

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15

Somit, Albert, and Steven A. Peterson. "Review Essay: Lynn and Vanhanen, IQ and Global Inequality." Politics and the Life Sciences 27, no. 1 (2008): 99–105. http://dx.doi.org/10.2990/27_1_99.

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IQ and Global Inequality is a sequel to the authors' earlier IQ and the Wealth of Nations wherein they argued that “… national differences in intelligence are an important factor contributing to differences in national wealth and rates of economic growth” (p. 2). Or, later more precisely stated, that “… national IQ is the single most powerful explanatory variable, but because the explained part of the variation does not rise higher than 40–60 percent, this explanation leaves room for other explanatory factors”(p. 13). Not surprisingly, even so qualified, this thesis triggered a “mixed receptio

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Ali, A., G. Ambler, A. Strydom, et al. "The relationship between happiness and intelligent quotient: the contribution of socio-economic and clinical factors." Psychological Medicine 43, no. 6 (2012): 1303–12. http://dx.doi.org/10.1017/s0033291712002139.

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BackgroundHappiness and higher intelligent quotient (IQ) are independently related to positive health outcomes. However, there are inconsistent reports about the relationship between IQ and happiness. The aim was to examine the association between IQ and happiness and whether it is mediated by social and clinical factors.MethodThe authors analysed data from the 2007 Adult Psychiatric Morbidity Survey in England. The participants were adults aged 16 years or over, living in private households in 2007. Data from 6870 participants were included in the study. Happiness was measured using a validat

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Voracek, Martin. "State IQ and Suicide Rates in the United States." Perceptual and Motor Skills 105, no. 1 (2007): 102–6. http://dx.doi.org/10.2466/pms.105.1.102-106.

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Previous findings pertaining to the direction (positive or negative) of the ecological correlation between intelligence and suicide rates in the USA have been conflicting. Using novel state IQ estimates, derived from the Scholastic Assessment Test, the American College Test, these tests combined, or the National Assessment of Educational Progress state scores, these estimates were not consistently associated to state suicide rates. Whereas ACT-derived state IQ was significantly positively correlated with suicide rates, the correlation with composite ACT-SAT-derived state IQ was significantly n

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18

Merema, Matt R., Craig P. Speelman, Elizabeth A. Kaczmarek, and Jonathan K. Foster. "Age and premorbid intelligence suppress complaint–performance congruency in raw score measures of memory." International Psychogeriatrics 24, no. 3 (2011): 397–405. http://dx.doi.org/10.1017/s1041610211001918.

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ABSTRACTBackground:We aimed to examine the role of age and premorbid intelligence (IQ) in suppressing the relationship between subjective memory complaints (SMCs) and raw score memory performance.Methods:We used a community sample of older adults aged 66–90 years (N= 121) to test whether the inclusion of age and a premorbid IQ measure in multiple regression analyses increased semipartial correlations of raw score memory performance in predicting SMCs. Rank contrast correlations were also carried out to observe how age and premorbid IQ are related to complaint–performance congruency. Measures u

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19

LYNN, RICHARD, GERHARD MEISENBERG, JAAN MIKK, and AMANDY WILLIAMS. "NATIONAL IQS PREDICT DIFFERENCES IN SCHOLASTIC ACHIEVEMENT IN 67 COUNTRIES." Journal of Biosocial Science 39, no. 6 (2007): 861–74. http://dx.doi.org/10.1017/s0021932007001964.

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SummaryThis paper examines the relationship of the national IQs reported by Lynn & Vanhanen (2002, 2006) to national achievement in mathematics and science among 8th graders in 67 countries. The correlation between the two is 0·92 and is interpreted as establishing the validity of the national IQs. The correlation is so high that national IQs and educational achievement appear to be measures of the same construct. National differences in educational achievement are greater than differences in IQ, suggesting an amplifier effect such that national differences in IQs amplify differences in ed

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20

Becker, David, and Heiner Rindermann. "The relationship between cross-national genetic distances and IQ-differences." Personality and Individual Differences 98 (August 2016): 300–310. http://dx.doi.org/10.1016/j.paid.2016.03.050.

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21

Barber, Nigel. "Educational and ecological correlates of IQ: A cross-national investigation." Intelligence 33, no. 3 (2005): 273–84. http://dx.doi.org/10.1016/j.intell.2005.01.001.

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SMITH, GLENN E., DARYL L. BOHAC, ROBERT J. IVNIK, and JAMES F. MALEC. "Using word recognition tests to estimate premorbid IQ in early dementia: Longitudinal data." Journal of the International Neuropsychological Society 3, no. 6 (1997): 528–33. http://dx.doi.org/10.1017/s1355617797005286.

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This study examined the utility of word recognition scores for estimating actual Verbal IQ scores obtained from 1–5 years earlier. Participants were 271 persons remaining normal and 24 initially normal persons who developed cognitive impairment over longitudinal follow-up. A previously published regression equation based on education and the American modification of the National Adult Reading Test (Nelson, 1982) was used to estimate Mayo Verbal IQ. In spite of correlating well with prior obtained scores (r = .7) the predicted score tended to overestimate the obtained Mayo Verbal IQ. A revised

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23

BRIGHT, PETER, ELI JALDOW, and MICHAEL D. KOPELMAN. "The National Adult Reading Test as a measure of premorbid intelligence: A comparison with estimates derived from demographic variables." Journal of the International Neuropsychological Society 8, no. 6 (2002): 847–54. http://dx.doi.org/10.1017/s1355617702860131.

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Since its publication in 1982, the National Adult Reading Test (NART; Revised Version, NART–R) has become a widely accepted method for estimating premorbid levels of intelligence in neuropsychological research. However, the assumption that NART/NART–R performance is relatively independent of brain damage has been increasingly challenged in recent years. In a number of conditions, including Alzheimer dementia and Korsakoff's syndrome, studies have indicated a deterioration in reading ability, leading to an underestimated premorbid IQ. In a reaction to these studies, some researchers have advoca

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Dutton, Edward, Salaheldin Farah Bakhiet, Khaled Elsayed Ziada, Yossry Ahmed Sayed Essa, Hamada Ali Abdelmuti Ali, and Shehana Mohammed Alqafari. "REGIONAL DIFFERENCES IN INTELLIGENCE IN EGYPT: A COUNTRY WHERE UPPER IS LOWER." Journal of Biosocial Science 51, no. 2 (2018): 273–81. http://dx.doi.org/10.1017/s0021932018000135.

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SummaryTwo administrations of the Coloured Progressive Matrices in Egypt were compared. The first was administered to a large, representative national sample between 2011 and 2013. The second was administered to primary school pupils in villages in Menoufia in northern Egypt in 2017. Adjusting for the Flynn Effect, the IQ of the rural northern Egyptians was shown to be statistically significantly higher than the national average. It is demonstrated that this is consistent with regional socioeconomic differences in Egypt, which strongly imply that northern Egypt has a higher average IQ than sou

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Fardell, Camilla, Kjell Torén, Linus Schiöler, Hans Nissbrandt, and Maria Åberg. "High IQ in Early Adulthood Is Associated with Parkinson’s Disease." Journal of Parkinson's Disease 10, no. 4 (2020): 1649–56. http://dx.doi.org/10.3233/jpd-202050.

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Background: High education level and high occupational complexity have been implicated as risk factors for Parkinson’s disease (PD). Objective: The objective was to determine whether cognitive capacity, measured as IQ, in early adulthood is associated with the subsequent development of PD. Method: Data on IQ were retrieved from the Swedish Military Service Conscription Registry, comprising Swedish males who enlisted for military service in the period 1968–1993 (N = 1,319,235). After exclusion, 1,189,134 subjects in total were included in the present study. Individuals who later developed PD (N

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CRAWFORD, J. R., I. J. DEARY, J. STARR, and L. J. WHALLEY. "The NART as an index of prior intellectual functioning: a retrospective validity study covering a 66-year interval." Psychological Medicine 31, no. 3 (2001): 451–58. http://dx.doi.org/10.1017/s0033291701003634.

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Background. The National Adult Reading Test (NART) is widely used in research and clinical practice as an estimate of pre-morbid or prior ability. However, most of the evidence on the NART's validity as a measure of prior intellectual ability is based on concurrent administration of the NART and an IQ measure.Method. We followed up 179 individuals who had taken an IQ test (the Moray House Test) at age 11 and administered the NART and the Mini-Mental State Examination (MMSE) at age 77. A subset (N=97) were also re-administered the original IQ test.Results. The correlation between NART performan

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Sörberg Wallin, Alma, Peter Allebeck, Jan-Eric Gustafsson, and Tomas Hemmingsson. "Childhood IQ and mortality during 53 years’ follow-up of Swedish men and women." Journal of Epidemiology and Community Health 72, no. 10 (2018): 926–32. http://dx.doi.org/10.1136/jech-2018-210675.

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BackgroundThe association between childhood cognitive ability measured with IQ tests and mortality is well documented. However, studies on the association in women are few and conflicting, and the mechanisms underlying the association are unclear.MethodsData on IQ were collected at school at age 13 among 19 919 men and women born in 1948 and 1953. Information on childhood socioeconomic position, the participants’ socioeconomic and social circumstances in middle age and mortality up to 2013 was collected through national registers.ResultsLower IQ was associated with an increased risk of all-cau

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Carl, Noah. "IQ AND SOCIOECONOMIC DEVELOPMENT ACROSS REGIONS OF THE UK." Journal of Biosocial Science 48, no. 3 (2015): 406–17. http://dx.doi.org/10.1017/s002193201500019x.

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SummaryCross-regional correlations between average IQ and socioeconomic development have been documented in many different countries. This paper presents new IQ estimates for the twelve regions of the UK. These are weakly correlated (r=0.24) with the regional IQs assembled by Lynn (1979). Assuming the two sets of estimates are accurate and comparable, this finding suggests that the relative IQs of different UK regions have changed since the 1950s, most likely due to differentials in the magnitude of the Flynn effect, the selectivity of external migration, the selectivity of internal migration

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Jones, Garett, and Niklas Potrafke. "Human capital and national institutional quality: Are TIMSS, PISA, and national average IQ robust predictors?" Intelligence 46 (September 2014): 148–55. http://dx.doi.org/10.1016/j.intell.2014.05.011.

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Kendler, Kenneth S., Henrik Ohlsson, Jan Sundquist, and Kristina Sundquist. "IQ and Schizophrenia in a Swedish National Sample: Their Causal Relationship and the Interaction of IQ With Genetic Risk." American Journal of Psychiatry 172, no. 3 (2015): 259–65. http://dx.doi.org/10.1176/appi.ajp.2014.14040516.

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Joyce, Eileen M., Sam B. Hutton, Stanley H. Mutsatsa, and Thomas R. E. Barnes. "Cognitive heterogeneity in first-episode schizophrenia." British Journal of Psychiatry 187, no. 6 (2005): 516–22. http://dx.doi.org/10.1192/bjp.187.6.516.

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BackgroundStudies of chronic schizophrenia suggest that there are subgroups with different profiles of cognitive impairment.AimsTo determine whether such heterogeneity is present at illness onset and any relationship to clinical variables.MethodNinety-three community patients with first-episode schizophrenia and 50 healthy volunteers were assessed for premorbid (Revised National Adult Reading Test) and current IQ, memory and executive function.ResultsHalf of those with schizophrenia had preserved IQ in the normal range but there was evidence of a specific impairment in spatial working memory e

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McHutchison, Caroline A., Francesca M. Chappell, Stephen Makin, Kirsten Shuler, Joanna M. Wardlaw, and Vera Cvoro. "Stability of Estimated Premorbid Cognitive Ability over Time after Minor Stroke and Its Relationship with Post-Stroke Cognitive Ability." Brain Sciences 9, no. 5 (2019): 117. http://dx.doi.org/10.3390/brainsci9050117.

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Considering premorbid or “peak” adult intelligence (IQ) is important when examining post-stroke cognition. The stability of estimated premorbid IQ and its relationship to current cognitive ability in stroke is unknown. We investigated changes in estimated premorbid IQ and current cognitive ability up to three years post-stroke. Minor stroke patients (NIHSS < 8) were assessed at one to three months, one and three years’ post-stroke. The National Adult Reading Test (NART) and Addenbrooke’s Cognitive Examination-Revised (ACE-R) were used to estimate premorbid IQ (NART IQ) and current cognitive

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Kappelmann, Nils, Golam M. Khandaker, Henrik Dal, et al. "Systemic inflammation and intelligence in early adulthood and subsequent risk of schizophrenia and other non-affective psychoses: a longitudinal cohort and co-relative study." Psychological Medicine 49, no. 2 (2018): 295–302. http://dx.doi.org/10.1017/s0033291718000831.

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AbstractBackgroundSchizophrenia is associated with impaired neurodevelopment as indexed by lower premorbid IQ. We examined associations between erythrocyte sedimentation rate (ESR), a marker of low-grade systemic inflammation, IQ, and subsequent schizophrenia and other non-affective psychoses (ONAP) to elucidate the role of neurodevelopment and inflammation in the pathogenesis of psychosis.MethodsPopulation-based data on ESR and IQ from 638 213 Swedish men assessed during military conscription between 1969 and 1983 were linked to National Hospital Discharge Register for hospitalisation with sc

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Kirkegaard, Helene, Sören Möller, Chunsen Wu, et al. "Associations of birth size, infancy, and childhood growth with intelligence quotient at 5 years of age: a Danish cohort study." American Journal of Clinical Nutrition 112, no. 1 (2020): 96–105. http://dx.doi.org/10.1093/ajcn/nqaa051.

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ABSTRACT Background The correlates of prenatal and postnatal growth on Intelligence Quotient (IQ) in childhood in term-born children living in high-income countries are not well known. Objectives We examined how birth size and growth in infancy and childhood were associated with IQ at age 5 y in term-born children using path analysis. Methods The study sample comprised 1719 children from the Danish National Birth Cohort who participated in a substudy in which psychologists assessed IQ using the Wechsler Primary and Preschool Scales of Intelligence–Revised. Measured weight, length/height, and h

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Whitley, E., C. R. Gale, I. J. Deary, M. Kivimaki, A. Singh-Manoux, and G. D. Batty. "Influence of maternal and paternal IQ on offspring health and health behaviours: Evidence for some trans-generational associations using the 1958 British birth cohort study." European Psychiatry 28, no. 4 (2012): 219–24. http://dx.doi.org/10.1016/j.eurpsy.2012.01.005.

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AbstractPurposeIndividuals scoring poorly on tests of intelligence (IQ) have been reported as having increased risk of morbidity, premature mortality, and risk factors such as obesity, high blood pressure, poor diet, alcohol and cigarette consumption. Very little is known about the impact of parental IQ on the health and health behaviours of their offspring.MethodsWe explored associations of maternal and paternal IQ scores with offspring television viewing, injuries, hospitalisations, long standing illness, height and BMI at ages 4 to 18 using data from the National Child Development Study (19

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Lynn, Richard, and Tatu Vanhanen. "National IQ and Economic Development: A Study of Eighty-One Nations." Mankind Quarterly 41, no. 4 (2001): 415–35. http://dx.doi.org/10.46469/mq.2001.41.4.3.

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Blair, Jennifer R., and Otfried Spreen. "Predicting premorbid IQ: A revision of the national adult reading test." Clinical Neuropsychologist 3, no. 2 (1989): 129–36. http://dx.doi.org/10.1080/13854048908403285.

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Mohamed, Inaam N., Abdelgadir H. Osman, Somia Mohamed, et al. "Intelligence quotient (IQ) among children with epilepsy: National epidemiological study – Sudan." Epilepsy & Behavior 103 (February 2020): 106813. http://dx.doi.org/10.1016/j.yebeh.2019.106813.

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Eppig, Christopher, Corey L. Fincher, and Randy Thornhill. "Parasite prevalence and the worldwide distribution of cognitive ability." Proceedings of the Royal Society B: Biological Sciences 277, no. 1701 (2010): 3801–8. http://dx.doi.org/10.1098/rspb.2010.0973.

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In this study, we hypothesize that the worldwide distribution of cognitive ability is determined in part by variation in the intensity of infectious diseases. From an energetics standpoint, a developing human will have difficulty building a brain and fighting off infectious diseases at the same time, as both are very metabolically costly tasks. Using three measures of average national intelligence quotient (IQ), we found that the zero-order correlation between average IQ and parasite stress ranges from r = −0.76 to r = −0.82 ( p < 0.0001). These correlations are robust worldwide, as well as

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Garcia, Paul. "Is Seizure Surgery an Option for Patients with Very Low IQ?" Epilepsy Currents 8, no. 6 (2008): 150–51. http://dx.doi.org/10.1111/j.1535-7511.2008.00275.x.

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Seizure Outcome after Resective Epilepsy Surgery in Patients with Low IQ. Malmgren K, Olsson I, Engman E, Flink R, Rydenhag B. Brain 2008;131(Pt 2):535–542. Epilepsy surgery has been questioned for patients with low IQ, since a low cognitive level is taken to indicate a widespread disturbance of cerebral function with unsatisfactory prognosis following resective surgery. The prevalence of epilepsy in patients with cognitive dysfunction is, however, higher than in the general population and the epilepsy is often more severe and difficult to treat. It is therefore important to try to clarify whe

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Lv, Zhike, and Ting Xu. "The impact of national IQ on longevity: New evidence from quantile regression." Personality and Individual Differences 101 (October 2016): 282–87. http://dx.doi.org/10.1016/j.paid.2016.06.021.

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Voracek, Martin. "EARLY 20TH CENTURY SOCIAL ECOLOGY OF U.S. STATE IQ AND SUICIDE RATES: EVIDENCE FROM THE ARMY ALPHA AND BETA INTELLIGENCE TEST DATA OF YERKES (1921)." Social Behavior and Personality: an international journal 35, no. 8 (2007): 1027–30. http://dx.doi.org/10.2224/sbp.2007.35.8.1027.

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Consistent with a number of facts from suicide research and an evolutionary view of suicidal behavior, positive ecological (group-level) correlations between contemporary suicide rates and intelligence level have been observed in several geographical (cross-national and within-nation) studies (e.g., Lester, 1993, 1995, 2003; Voracek, 2004, 2005a, 2005b, 2006a-h, 2007). The present research extended these accounts cross-temporally to a test of the social ecology of U.S. state IQ and suicide rates during the early 20th century. Analysis of historical state suicide rates (1913–24), along with val

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Reeve, Charlie L. "Expanding the g-nexus: Further evidence regarding the relations among national IQ, religiosity and national health outcomes." Intelligence 37, no. 5 (2009): 495–505. http://dx.doi.org/10.1016/j.intell.2009.06.003.

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Petersen, Inge, Vibeke Myrup Jensen, Matt McGue, Paul Bingley, and Kaare Christensen. "No Evidence of Genetic Mediation in the Association Between Birthweight and Academic Performance in 2,413 Danish Adolescent Twin Pairs." Twin Research and Human Genetics 12, no. 6 (2009): 564–72. http://dx.doi.org/10.1375/twin.12.6.564.

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AbstractEvidence of a positive association between birthweight and IQ has been established in several studies. Analyses of within twin pair differences in birthweight and IQ have been used to shed light on the basis of the association. The strength of this approach is the possibility of controlling for both unmeasured common childhood–environmental factors as well as genetic factors shared by the co-twins. Two twin studies suggest the existence of genetic mediation between birthweight and IQ, that is, common genetic factors influence both fetal growth and IQ in childhood, while two other twin

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Barrail-Tran, Aurélie, Laurence Morand-Joubert, Gwendoline Poizat, et al. "Predictive Values of the Human Immunodeficiency Virus Phenotype and Genotype and of Amprenavir and Lopinavir Inhibitory Quotients in Heavily Pretreated Patients on a Ritonavir-Boosted Dual-Protease-Inhibitor Regimen." Antimicrobial Agents and Chemotherapy 52, no. 5 (2008): 1642–46. http://dx.doi.org/10.1128/aac.01314-07.

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ABSTRACT The inhibitory quotient (IQ) of human immunodeficiency virus (HIV) protease inhibitors (PIs), which is the ratio of drug concentration to viral susceptibility, is considered to be predictive of the virological response. We used several approaches to calculate the IQs of amprenavir and lopinavir in a subset of heavily pretreated patients participating in the French National Agency for AIDS Research (ANRS) 104 trial and then compared their potentials for predicting changes in the plasma HIV RNA level. Thirty-seven patients were randomly assigned to receive either amprenavir (600 mg twic

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RINDERMANN, HEINER, and JAMES THOMPSON. "THE COGNITIVE COMPETENCES OF IMMIGRANT AND NATIVE STUDENTS ACROSS THE WORLD: AN ANALYSIS OF GAPS, POSSIBLE CAUSES AND IMPACT." Journal of Biosocial Science 48, no. 1 (2014): 66–93. http://dx.doi.org/10.1017/s0021932014000480.

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SummaryImmigration, immigration policies and education of immigrants alter competence levels. This study analysed their effects using PISA, TIMSS and PIRLS data (1995 to 2012,N=93 nations) for natives' and immigrants' competences, competence gaps and their population proportions. The mean gap is equivalent to 4.71 IQ points. There are large differences across countries in these gaps ranging from around +12 to −10 IQ points. Migrants' proportions grow roughly 4% per decade. The largest immigrant-based ‘brain gains’ are observed for Arabian oil-based economies, and the largest ‘brain losses’ for

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Wicherts, Jelte M., Denny Borsboom, and Conor V. Dolan. "Evolution, brain size, and the national IQ of peoples around 3000 years B.C." Personality and Individual Differences 48, no. 2 (2010): 104–6. http://dx.doi.org/10.1016/j.paid.2009.08.020.

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ROLSTAD, SINDRE, ARTO NORDLUND, MARIE HELENE GUSTAVSSON, et al. "The Swedish National Adult Reading Test (NART-SWE): A test of premorbid IQ." Scandinavian Journal of Psychology 49, no. 6 (2008): 577–82. http://dx.doi.org/10.1111/j.1467-9450.2008.00677.x.

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Stebbins, Glenn T., Robert S. Wilson, David W. Gilley, Bryan A. Bernard, and Jacob H. Fox. "Use of the national adult reading test to estimate premorbid iq in dementia." Clinical Neuropsychologist 4, no. 1 (1990): 18–24. http://dx.doi.org/10.1080/13854049008401493.

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Russell, A. J., J. Munro, P. B. Jones, P. Hayward, D. R. Hemsley, and R. M. Murray. "The National Adult Reading Test as a measure of premorbid IQ in schizophrenia." British Journal of Clinical Psychology 39, no. 3 (2000): 297–305. http://dx.doi.org/10.1348/014466500163301.

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