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10 - Sex, Gender, and Intelligence

Does XX = XY for Intelligence?

from Section 3 - Cognitive and Social Factors

Published online by Cambridge University Press:  20 July 2020

Fanny M. Cheung
Affiliation:
The Chinese University of Hong Kong
Diane F. Halpern
Affiliation:
Claremont McKenna College, California
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Summary

We conclude that there are no overall (average) differences between women and men in general intelligence, but there are some large and persistent differences on cognitive abilities that on average favor males (e.g. mathematics, mental rotation, mechanical) or favor females (verbal ability, most tests of memory). There are more males in the low end of the intelligence distribution, at least in part, for sex-related genetic reasons. There is no genetic evidence for more males in the high end of the intelligence distribution. Paradoxically, societies with greater gender equality do not show reduced differences on many cognitive measures. Our conclusions are about group differences. Thus, these mean differences have no clinical or social significance at the individual level.

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Publisher: Cambridge University Press
Print publication year: 2020

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Suggested Readings

To give readers a broad coverage of the field we suggest reading articles written from various perspectives. We hope that the contradictions in these readings will encourage readers to think critically about this controversial topic.

Diane F. Halpern is Professor of Psychology Emerita from Claremont McKenna College and Dean of Social Sciences Emerita from Minerva Schools at KGI. She has published many books and hundreds of journal articles on sex differences in cognitive abilities and critical thinking, and is the author of the Halpern Critical Thinking Assessment (HCTA). She is past president of the American Psychological Association, the Western Psychological Association, and the Society for the Teaching of Psychology. She was named the Federation of Associations in Behavioral & Brain Sciences (FABBS) Honored Scientist (IHO) “Who made important and lasting contributions to the science of mind, brain, and behavior.” www.fabbs.org/fabbs-foundation/honoring-our-scientists/honor-diane-f-ha/

Halpern was born in Philadelphia, Pennsylvania. In order to get a better understanding of psychology from numerous cultures, she taught courses (most of them a semester long) in Canada, Mexico, Turkey, Russia, China, and Portugal, among other places. Her parents immigrated to the United States to escape the dangerous growth of anti-Semitism in Europe. Her father was from Romania and her mother was from Poland. Her first language was Yiddish, which developed as a fusion of German, Hebrew, Aramaic, and Slavic languages. She has a racially mixed family.

Carmen Flores-Mendoza is a psychologist at Federal University of Minas Gerais, Brazil. She works on individual differences in intelligence and personality, especially in the Latin American context. Flores-Mendoza was born in Lima, Peru. In the 1980s, her family moved to Brazil to escape the armed conflict (internal war) between the government of Peru and the Communist Party of Peru (a terrorist group known as Shining Path). The armed conflict turned Peru into a country where it was not safe to live. Now she has two nationalities: Peruvian and Brazilian.  She attended University in the state of São Paulo, Brazil, and received her PhD from University of São Paulo. Her paternal grandmother was Chinese, and her paternal grandfather was indigenous Peruvian. Her maternal grandmother was “mulatto” (Black + White), and her maternal grandfather was a Spaniard (from Spain). So, Flores-Mendoza represents a mix of races.

Heiner Rindermann is a psychologist at TU Chemnitz, Germany, and works on education, ability development, intelligence, student achievement, economy and culture, and their interplay at the level of individuals and societies. Rindermann was born in Cologne, Germany, and grew up in Baden-Württemberg. He received his PhD from Heidelberg University. From 2008 to 2010, he was Professor of Evaluation and Methodology of Developmental Psychology at the University of Graz in Austria. He is a member of ISIR, APS, AEA, and Heterodox Academy. Science is for him an intellectual-philosophical task. He likes to walk, camp, and swim in the wilderness. He also likes to take photos (nature, architecture, art, people).

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Johnson, W., Carothers, A., & Deary, I. J. (2008). Sex differences in variability in general intelligence: A new look at the old question. Perspectives on Psychological Science, 3, 518531. doi:10.1111/j.1745-6924.2008.00096.xGoogle Scholar
Lynn, R., & Irwing, P. (2004). Sex differences on the progressive matrices: A meta-analysis. Intelligence, 32, 481498. doi:10.1016/j.intell.2004.06.008Google Scholar
Nyborg, H. (2003). Sex differences in g. In Nyborg, H. (Ed.), The scientific study of general intelligence: Tribute to Arthur R. Jensen (pp. 187222). Oxford: Pergamon.Google Scholar
Wai, J., Cacchio, M., Putallaz, M., & Makel, M.C. (2010). Sex differences in the right tail of cognitive abilities: A 30-year examination. Intelligence, 38, 412423. doi:10.1016/j.intell.2010.04.006CrossRefGoogle Scholar

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