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The g‐factor of international cognitive ability comparisons: the homogeneity of results in PISA, TIMSS, PIRLS and IQ‐tests across nations
Abstract
International cognitive ability and achievement comparisons stem from different research traditions. But analyses at the interindividual data level show that they share a common positive manifold. Correlations of national ability means are even higher to very high (within student assessment studies, r = .60–.98; between different student assessment studies [PISA‐sum with TIMSS‐sum] r = .82–.83; student assessment sum with intelligence tests, r = .85–.86). Results of factor analyses indicate a strong g‐factor of differences between nations (variance explained by the first unrotated factor: 94–95%). Causes of the high correlations are seen in the similarities of tests within studies, in the similarities of the cognitive demands for tasks from different tests, and in the common developmental factors at the individual and national levels including known environmental and unknown genetic influences. Copyright © 2007 John Wiley & Sons, Ltd.
Citing Literature
Number of times cited: 134
- Nicola Pensiero and Andy Green, The effects of post‐compulsory education and training systems on literacy and numeracy skills: A comparative analysis using PISA 2000 and the 2011 survey of adult skills, European Journal of Education, 53, 2, (238-253), (2018).
- Oasis Kodila‐Tedika and Simplice A. Asongu, Does Intelligence Affect Economic Diversification?, German Economic Review, 19, 1, (74-93), (2016).
- Federico R. León, Diminished UV radiation enhances national cognitive ability, wealth, and institutions through health and education, Personality and Individual Differences, 120, (52), (2018).
- Franz J. Neyer and Jens B. Asendorpf, Persönlichkeit im Kulturvergleich, Psychologie der Persönlichkeit, 10.1007/978-3-662-54942-1_8, (387-421), (2017).
- Andrew S. Winston, Neoliberalism and IQ: Naturalizing economic and racial inequality, Theory & Psychology, 10.1177/0959354318798160, 28, 5, (600-618), (2018).
- Therese N. Hopfenbeck, Jenny Lenkeit, Yasmine El Masri, Kate Cantrell, Jeanne Ryan and Jo-Anne Baird, Lessons Learned from PISA: A Systematic Review of Peer-Reviewed Articles on the Programme for International Student Assessment, Scandinavian Journal of Educational Research, (1), (2017).
- Rik W. Hafer, Female Entrepreneurship and IQ , The Wiley Handbook of Entrepreneurship, (187-204), (2017).
- Brian P. Godor and Antonia Szymanski, Sense of belonging or feeling marginalized? Using PISA 2012 to assess the state of academically gifted students within the EU, High Ability Studies, 28, 2, (181), (2017).
- Alla T. Alzhanova-Ericsson, Christina Bergman and Patrik Dinnétz, Lecture attendance is a pivotal factor for improving prospective teachers’ academic performance in Teaching and Learning Mathematics, Journal of Further and Higher Education, 41, 1, (1), (2017).
- R.W. Hafer, New estimates on the relationship between IQ, economic growth and welfare, Intelligence, 61, (92), (2017).
- , Fluid Ability (Gf) and Complex Problem Solving (CPS), Journal of Intelligence, 5, 3, (28), (2017).
- Tecla Mlambo, Jennifer Jelsma, Simba Rusakaniko, Naomi Dale and Alfred Chingono, Predictors of Zimbabwean children’s neuro-cognitive performance on the Detroit Tests of Learning Aptitude fourth edition (DTLA-4): Implications for policy, practice and research, World Federation of Occupational Therapists Bulletin, 73, 2, (94), (2017).
- Steffani Saß, Nele Kampa and Olaf Köller, The interplay of g and mathematical abilities in large-scale assessments across grades, Intelligence, 63, (33), (2017).
- Patrick Kyllonen and Harrison Kell, What Is Fluid Intelligence? Can It Be Improved?, Cognitive Abilities and Educational Outcomes, 10.1007/978-3-319-43473-5_2, (15-37), (2016).
- David Giofrè, Erika Borella and Irene Cristina Mammarella, The relationship between intelligence, working memory, academic self-esteem, and academic achievement, Journal of Cognitive Psychology, 29, 6, (731), (2017).
- Nik Ahmad Sufian Burhan, Melor Md. Yunus, María Elena Labastida Tovar and Nik Mohd Ghazi Burhan, Why are cognitive abilities of children so different across countries? The link between major socioeconomic factors and PISA test scores, Personality and Individual Differences, 105, (95), (2017).
- Jüri Allik, A. Timothy Church, Fernando A. Ortiz, Jérôme Rossier, Martina Hřebíčková, Filip de Fruyt, Anu Realo and Robert R. McCrae, Mean Profiles of the NEO Personality Inventory, Journal of Cross-Cultural Psychology, 48, 3, (402), (2017).
- Janek Musek, Dimensional Structure of Personality and Beyond, The General Factor of Personality, 10.1016/B978-0-12-811209-0.00008-X, (205-256), (2017).
- Zhike Lv, Intelligence and corruption: An empirical investigation in a non-linear framework, Journal of Behavioral and Experimental Economics, 10.1016/j.socec.2017.06.003, 69, (83-91), (2017).
- Robert J. Sternberg, Groundhog Day: Is the Field of Human Intelligence Caught in a Time Warp? A Comment on Kovacs and Conway, Psychological Inquiry, 27, 3, (236), (2016).
- Jeroen Lavrijsen and Ides Nicaise, Educational tracking, inequality and performance: New evidence from a differences-in-differences technique, Research in Comparative and International Education, 11, 3, (334), (2016).
- Zhike Lv and Ting Xu, Does intelligence affect health care expenditure? Evidence from a cross-country analysis, Intelligence, 55, (86), (2016).
- Jakob B. Madsen, Barriers to Prosperity: Parasitic and Infectious Diseases, IQ, and Economic Development, World Development, 78, (172), (2016).
- Andy Green and Nicola Pensiero, The effects of upper‐secondary education and training systems on skills inequality. A quasi‐cohort analysis using PISA 2000 and the OECD survey of adult skills, British Educational Research Journal, 42, 5, (756-779), (2016).
- Zhike Lv and Ting Xu, The impact of national IQ on longevity: New evidence from quantile regression, Personality and Individual Differences, 101, (282), (2016).
- Francesca Borgonovi and Przemyslaw Biecek, An international comparison of students' ability to endure fatigue and maintain motivation during a low-stakes test, Learning and Individual Differences, 49, (128), (2016).
- Jan-Eric Gustafsson, Lasting effects of quality of schooling: Evidence from PISA and PIAAC, Intelligence, 57, (66), (2016).
- Edward Dutton, Book Review, Personality and Individual Differences, 96, (279), (2016).
- Thomas R. Coyle, Heiner Rindermann and Dale Hancock, Cognitive Capitalism, Psychological Reports, 119, 2, (411), (2016).
- R.W. Hafer, Cross-country evidence on the link between IQ and financial development, Intelligence, 55, (7), (2016).
- David Becker and Heiner Rindermann, The relationship between cross-national genetic distances and IQ-differences, Personality and Individual Differences, 98, (300), (2016).
- Edward Dutton, Dimitri Van der Linden, Guy Madison, Jan Antfolk and Michael A. Woodley of Menie, The intelligence and personality of Finland's Swedish-speaking minority, Personality and Individual Differences, 97, (45), (2016).
- Heiner Rindermann, David Becker and Thomas R. Coyle, Survey of Expert Opinion on Intelligence: Causes of International Differences in Cognitive Ability Tests, Frontiers in Psychology, 7, (2016).
- Oasis Kodila-Tedika and Simplice A. Asongu, Genetic distance and cognitive human capital: a cross-national investigation, Journal of Bioeconomics, 10.1007/s10818-015-9210-7, 18, 1, (33-51), (2015).
- Garett Jones, IQ and National Productivity, The New Palgrave Dictionary of Economics, 10.1057/978-1-349-95121-5_3004-1, (1-17), (2016).
- Federico R. León and Edvard Avilés, How altitude above sea level affects intelligence, Intelligence, 58, (33), (2016).
- Heike Wendt and Daniel Kasper, Subject-specific strength and weaknesses of fourth-grade students in Europe: a comparative latent profile analysis of multidimensional proficiency patterns based on PIRLS/TIMSS combined 2011, Large-scale Assessments in Education, 4, 1, (2016).
- J.C.F. de Winter and D. Dodou, National correlates of self-reported traffic violations across 41 countries, Personality and Individual Differences, 98, (145), (2016).
- Kenya Kura, Jan te Nijenhuis and Edward Dutton, Why Do Northeast Asians Win So Few Nobel Prizes?, Comprehensive Psychology, 4, (04.17.CP.4.15), (2015).
- Oasis Kodila-Tedika and Simplice A. Asongu, The effect of intelligence on financial development: A cross-country comparison, Intelligence, 51, (1), (2015).
- Richard Lynn, Caner Sakar and Helen Cheng, Regional differences in intelligence, income and other socio-economic variables in Turkey, Intelligence, 50, (144), (2015).
- Federico R. León and Andrés Burga-León, How geography influences complex cognitive ability, Intelligence, 50, (221), (2015).
- Maciej Jakubowski and Artur Pokropek, Reading achievement progress across countries, International Journal of Educational Development, 45, (77), (2015).
- Vittorio Daniele, Two Italies? Genes, intelligence and the Italian North–South economic divide, Intelligence, 49, (44), (2015).
- R. W. Hafer and Garett Jones, Are entrepreneurship and cognitive skills related? Some international evidence, Small Business Economics, 44, 2, (283), (2015).
- Richard Lynn and Prateek Yadav, Differences in cognitive ability, per capita income, infant mortality, fertility and latitude across the states of India, Intelligence, 49, (179), (2015).
- Raufhon Salahodjaev, Intelligence and finance, Personality and Individual Differences, 86, (282), (2015).
- Paul Andrews, Mathematics, PISA, and culture: An unpredictable relationship, Journal of Educational Change, 16, 3, (251), (2015).
- Carmen Flores-Mendoza, Marcela Mansur-Alves, Rubén Ardila, Ricardo D. Rosas, Maria Karla Guerrero-Leiva, Maria Emilia Lucio-Gómez Maqueo, Miguel Gallegos, Norma Reategui Colareta and Andrés Burga León, Fluid intelligence and school performance and its relationship with social variables in Latin American samples, Intelligence, 49, (66), (2015).
- M. Kyriakidis, R. Happee and J.C.F. de Winter, Public opinion on automated driving: Results of an international questionnaire among 5000 respondents, Transportation Research Part F: Traffic Psychology and Behaviour, 32, (127), (2015).
- Lazar Stankov and Gerard Saucier, Social Axioms in 33 Countries, Journal of Cross-Cultural Psychology, 46, 2, (296), (2015).
- Oasis Kodila-Tedika and Simplice A. Asongu, Intelligence, human capital and HIV/AIDS: Fresh exploration, Intelligence, 53, (154), (2015).
- Federico R. León, The east-to-west decay of math and reading scores in the United States: A prediction from UVB radiation theory, Personality and Individual Differences, 86, (287), (2015).
- Andreas Schröer and Richard B. Händel, Data Bases and Statistical Systems: Education, General, International Encyclopedia of the Social & Behavioral Sciences, 10.1016/B978-0-08-097086-8.41071-8, (763-768), (2015).
- Ciping Deng and George K. Georgiou, Establishing Measurement Invariance of the Cognitive Assessment System Across Cultures, Cognition, Intelligence, and Achievement, 10.1016/B978-0-12-410388-7.00008-7, (137-148), (2015).
- Denisse Manrique Millones, Carmen Flores-Mendoza and Rosa Millones Rivalles, Intelligence in Peru: Students' results in Raven and its relationship to SES, Intelligence, 51, (71), (2015).
- Katharina Kriegbaum, Malte Jansen and Birgit Spinath, Motivation: A predictor of PISA's mathematical competence beyond intelligence and prior test achievement, Learning and Individual Differences, 43, (140), (2015).
- Edward Dutton, Jan te Nijenhuis and Eka Roivainen, Solving the puzzle of why Finns have the highest IQ, but one of the lowest number of Nobel prizes in Europe, Intelligence, 46, (192), (2014).
- Karin Täht, Olev Must, Kätlin Peets and Rainer Kattel, Learning motivation from a cross-cultural perspective: a moving target?, Educational Research and Evaluation, 20, 4, (255), (2014).
- Federico R. León and Andrés Burga León, Why complex cognitive ability increases with absolute latitude, Intelligence, 46, (291), (2014).
- Sascha Hein, Jodi Reich, Philip E. Thuma and Elena L. Grigorenko, Physical Growth and Nonverbal Intelligence: Associations in Zambia, The Journal of Pediatrics, 165, 5, (1017), (2014).
- Davide Piffer and Richard Lynn, New evidence for differences in fluid intelligence between north and south Italy and against school resources as an explanation for the north–south IQ differential, Intelligence, 46, (246), (2014).
- Garett Jones and Niklas Potrafke, Human capital and national institutional quality: Are TIMSS, PISA, and national average IQ robust predictors?, Intelligence, 46, (148), (2014).
- Noah Carl, Does intelligence explain the association between generalized trust and economic development?, Intelligence, 47, (83), (2014).
- Elijah L. Armstrong, Heitor B.F. Fernandes and Michael A. Woodley, SD–IE and other differentiation effects in Italy and Spain, Personality and Individual Differences, 68, (189), (2014).
- Heitor B.F. Fernandes, Michael A. Woodley and Jan te Nijenhuis, Differences in cognitive abilities among primates are concentrated on G: Phenotypic and phylogenetic comparisons with two meta-analytical databases, Intelligence, 46, (311), (2014).
- Nathan Brody, A plea for the teaching of intelligence: Personal reflections, Intelligence, 42, (136), (2014).
- Nik Ahmad Sufian Burhan, Mohd Rosli Mohamad, Yohan Kurniawan and Abdul Halim Sidek, The impact of low, average, and high IQ on economic growth and technological progress: Do all individuals contribute equally?, Intelligence, 46, (1), (2014).
- Michael A. Woodley, Heiner Rindermann, Edward Bell, James Stratford and Davide Piffer, The relationship between Microcephalin, ASPM and intelligence: A reconsideration, Intelligence, 44, (51), (2014).
- Eka Roivainen, Are Cross-National Differences in IQ Profiles Stable? A Comparison of Finnish and U.S. WAIS Norms, International Journal of Testing, 13, 2, (140), (2013).
- Ariel Belasen and R.W. Hafer, IQ and alcohol consumption : International data, Intelligence, 41, 5, (615), (2013).
- Cesare Cornoldi, David Giofrè and Angela Martini, Problems in deriving Italian regional differences in intelligence from 2009 PISA data, Intelligence, 41, 1, (25), (2013).
- Kenya Kura, Japanese north–south gradient in IQ predicts differences in stature, skin color, income, and homicide rate, Intelligence, 41, 5, (512), (2013).
- Thorsten Pachur and Mirta Galesic, Strategy Selection in Risky Choice: The Impact of Numeracy, Affect, and Cross‐Cultural Differences, Journal of Behavioral Decision Making, 26, 3, (260-271), (2012).
- Daniel P. Mears and Joshua C. Cochran, What is the effect of IQ on offending?, Criminal Justice and Behavior, 40, 11, (1280), (2013).
- Thomas R. Coyle and Heiner Rindermann, Spearman’s Law of Diminishing Returns and national ability, Personality and Individual Differences, 55, 4, (406), (2013).
- Madhukar Shivajirao Dama, Cognitive ability correlates positively with son birth and predicts cross-cultural variation of the offspring sex ratio, Naturwissenschaften, 100, 6, (559), (2013).
- Kristian Koerselman, Incentives from curriculum tracking, Economics of Education Review, 32, (140), (2013).
- Vittorio Daniele and Nicola Ostuni, The burden of disease and the IQ of nations, Learning and Individual Differences, 28, (109), (2013).
- Marjolein Drent, Martina R.M. Meelissen and Fabienne M. van der Kleij, The contribution of TIMSS to the link between school and classroom factors and student achievement, Journal of Curriculum Studies, 45, 2, (198), (2013).
- Rolf Strietholt, Monica Rosén and Wilfried Bos, A correction model for differences in the sample compositions: the degree of comparability as a function of age and schooling, Large-scale Assessments in Education, 1, 1, (1), (2013).
- Martin Voracek, National Intelligence Estimates and the Failed State Index, Psychological Reports, 113, 2, (519), (2013).
- Norman Eng, The Impact of Demographics on 21st Century Education, Society, 50, 3, (272), (2013).
- Günter Krampen, Cross-Sequential Results on Creativity Development in Childhood Within two Different School Systems: Divergent Performances in Luxembourg Versus German Kindergarten and Elementary School Students, Europe’s Journal of Psychology, 8, 3, (423), (2012).
- B. Spinath, Academic Achievement, Encyclopedia of Human Behavior, 10.1016/B978-0-12-375000-6.00001-X, (1-8), (2012).
- Jaan Mikk, Karin Täht and Olev Must, Sex differences in educational attainment, Personality and Individual Differences, 53, 2, (132), (2012).
- Donald I. Templer, Biological correlates of northern–southern Italy differences in IQ, Intelligence, 40, 5, (511), (2012).
- Heiner Rindermann, Michael A. Woodley and James Stratford, Haplogroups as evolutionary markers of cognitive ability, Intelligence, 40, 4, (362), (2012).
- Earl Hunt, What Makes Nations Intelligent?, Perspectives on Psychological Science, 7, 3, (284), (2012).
- Alsedig Abdalgadr Al-Shahomee, A standardisation of the Standard Progressive Matrices for adults in Libya, Personality and Individual Differences, 53, 2, (142), (2012).
- Richard Lynn and Tatu Vanhanen, National IQs: A review of their educational, cognitive, economic, political, demographic, sociological, epidemiological, geographic and climatic correlates, Intelligence, 40, 2, (226), (2012).
- Jüri Allik, National differences in personality, Personality and Individual Differences, 53, 2, (114), (2012).
- Antonella D'Amico, Maurizio Cardaci, Santo Di Nuovo and Jack A. Naglieri, Differences in achievement not in intelligence in the north and south of Italy: Comments on, Learning and Individual Differences, 22, 1, (128), (2012).
- Ting-Kuang Yeh, Chung-Yi Hu, Ting-Chi Yeh, Pei-Jung Lin, Chung-Hsin Wu, Po-Lei Lee and Chun-Yen Chang, Association of polymorphisms in BDNF, MTHFR, and genes involved in the dopaminergic pathway with memory in a healthy Chinese population, Brain and Cognition, 80, 2, (282), (2012).
- Garett Jones, Cognitive skill and technology diffusion: An empirical test, Economic Systems, 36, 3, (444), (2012).
- Vittorio Daniele and Paolo Malanima, Are people in the South less intelligent than in the North? IQ and the North–South disparity in Italy, The Journal of Socio-Economics, 40, 6, (844), (2011).
- Rocio Garcia-Retamero, Mirta Galesic and Gerd Gigerenzer, Enhancing Understanding and Recall of Quantitative Information about Medical Risks: A Cross-Cultural Comparison between Germany and Spain, The Spanish journal of psychology, 14, 01, (218), (2011).
- Liang Zhang and Kristen A. Lee, Decomposing achievement gaps among OECD countries, Asia Pacific Education Review, 12, 3, (463), (2011).
- Donald I. Templer and J. Philippe Rushton, IQ, skin color, crime, HIV/AIDS, and income in 50 U.S. states, Intelligence, 39, 6, (437), (2011).
- Mathilde Almlund, Angela Lee Duckworth, James Heckman and Tim Kautz, Personality Psychology and Economics, Handbook of The Economics of Education, 10.1016/B978-0-444-53444-6.00001-8, (1-181), (2011).
- Lazar Stankov, Unforgiving Confucian culture: A breeding ground for high academic achievement, test anxiety and self-doubt?, Learning and Individual Differences, 20, 6, (555), (2010).
- Gary N. Marks, Meritocracy, modernization and students’ occupational expectations: Cross-national evidence, Research in Social Stratification and Mobility, 28, 3, (275), (2010).
- Richard Lynn, In Italy, north–south differences in IQ predict differences in income, education, infant mortality, stature, and literacy, Intelligence, 38, 1, (93), (2010).
- Eka Roivainen, European and American WAIS III norms: Cross-national differences in performance subtest scores, Intelligence, 38, 1, (187), (2010).
- Richard Lynn and Gerhard Meisenberg, National IQs calculated and validated for 108 nations, Intelligence, 38, 4, (353), (2010).
- Jelte M. Wicherts, Conor V. Dolan, Jerry S. Carlson and Han L.J. van der Maas, Raven's test performance of sub-Saharan Africans: Average performance, psychometric properties, and the Flynn Effect, Learning and Individual Differences, 10.1016/j.lindif.2009.12.001, 20, 3, (135-151), (2010).
- C. Eppig, C. L. Fincher and R. Thornhill, Parasite prevalence and the worldwide distribution of cognitive ability, Proceedings of the Royal Society B: Biological Sciences, 277, 1701, (3801), (2010).
- Herman G. Van de Werfhorst and Jonathan J.B. Mijs, Achievement Inequality and the Institutional Structure of Educational Systems: A Comparative Perspective, Annual Review of Sociology, 36, 1, (407), (2010).
- Earl Hunt, The rights and responsibilities implied by academic freedom, Personality and Individual Differences, 49, 4, (264), (2010).
- Jan Van Damme, Hongqiang Liu, Lobke Vanhee and Heidi Pustjens, Longitudinal studies at the country level as a new approach to educational effectiveness: explaining change in reading achievement (PIRLS) by change in age, socio‐economic status and class size, Effective Education, 2, 1, (53), (2010).
- David F. Marks, IQ Variations across Time, Race, and Nationality: An Artifact of Differences in Literacy Skills, Psychological Reports, 106, 3, (643), (2010).
- Jelte M. Wicherts, Conor V. Dolan and Han L.J. van der Maas, A systematic literature review of the average IQ of sub-Saharan Africans, Intelligence, 38, 1, (1), (2010).
- Rocio Garcia-Retamero and Mirta Galesic, Who proficts from visual aids: Overcoming challenges in people's understanding of risks, Social Science & Medicine, 70, 7, (1019), (2010).
- J. Philippe Rushton and Jelena Čvorović, Data on the Raven’s Standard Progressive Matrices from four Serbian samples, Personality and Individual Differences, 46, 4, (483), (2009).
- Symen A. Brouwers, Fons J.R. Van de Vijver and Dianne A. Van Hemert, Variation in Raven's Progressive Matrices scores across time and place, Learning and Individual Differences, 19, 3, (330), (2009).
- J. Philippe Rushton and Donald I. Templer, National differences in intelligence, crime, income, and skin color, Intelligence, 37, 4, (341), (2009).
- Ting-Kuang Yeh, Chun-Yen Chang, Chung-Yi Hu, Ting-Chi Yeh and Ming-Yeh Lin, Association of catechol-O-methyltransferase (COMT) polymorphism and academic achievement in a Chinese cohort, Brain and Cognition, 71, 3, (300), (2009).
- Richard Lynn, John Harvey and Helmuth Nyborg, Average intelligence predicts atheism rates across 137 nations, Intelligence, 37, 1, (11), (2009).
- J. Philippe Rushton and C. Davison Ankney, Whole Brain Size and General Mental Ability: A Review, International Journal of Neuroscience, 119, 5, (692), (2009).
- Charlie L. Reeve, Expanding the g-nexus: Further evidence regarding the relations among national IQ, religiosity and national health outcomes, Intelligence, 37, 5, (495), (2009).
- SATOSHI KANAZAWA, IQ AND THE VALUES OF NATIONS, Journal of Biosocial Science, 41, 04, (537), (2009).
- Heiner Rindermann and Gerhard Meisenberg, Relevance of education and intelligence at the national level for health: The case of HIV and AIDS, Intelligence, 37, 4, (383), (2009).
- Jürgen Baumert, Oliver Lüdtke, Ulrich Trautwein and Martin Brunner, Large-scale student assessment studies measure the results of processes of knowledge acquisition: Evidence in support of the distinction between intelligence and student achievement, Educational Research Review, 4, 3, (165), (2009).
- Helmuth Nyborg, The intelligence–religiosity nexus: A representative study of white adolescent Americans, Intelligence, 37, 1, (81), (2009).
- Heiner Rindermann and Stephen J. Ceci, Educational Policy and Country Outcomes in International Cognitive Competence Studies, Perspectives on Psychological Science, 4, 6, (551), (2009).
- Jason Malloy, James Watson tells the inconvenient truth: Faces the consequences, Medical Hypotheses, 70, 6, (1081), (2008).
- Michael A. McDaniel, , Intelligence, 36, 6, (731), (2008).
- Garry A. Gelade, The geography of IQ, Intelligence, 36, 6, (495), (2008).
- Martin Voracek, Cross-National Social Ecology of Intelligence and Suicide Prevalence: Integration, Refinement, and Update of Studies, Perceptual and Motor Skills, 106, 2, (550), (2008).
- Heiner Rindermann, Relevance of education and intelligence for the political development of nations: Democracy, rule of law and political liberty, Intelligence, 36, 4, (306), (2008).
- Garry A. Gelade, IQ, cultural values, and the technological achievement of nations, Intelligence, 36, 6, (711), (2008).
- Filip De Fruyt, Karla Van Leeuwen, Marleen De Bolle and Barbara De Clercq, Sex differences in school performance as a function of conscientiousness, imagination and the mediating role of problem behaviour, European Journal of Personality, 22, 3, (167-184), (2008).
- Martin Voracek, National Intelligence and Suicide Rate across Europe: An Alternative Test Using Educational Attainment Data, Psychological Reports, 101, 2, (512), (2007).
- MARTIN VORACEK, NATIONAL INTELLIGENCE AND SUICIDE RATE ACROSS EUROPE: AN ALTERNATIVE TEST USING EDUCATIONAL ATTAINMENT DATA, Psychological Reports, 101, 6, (512), (2007).
