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  • Print publication year: 2011
  • Online publication date: June 2012

Chapter 13 - Sex Differences in Intelligence

from Part III - Intelligence and Group Differences


This chapter attempts to broadly outline the current understanding of the etiology of intelligence and intelligence-related processes. First, it describes the major concepts that have primarily guided studies of the etiological bases of intellectual abilities and disabilities. Then, the chapter discusses the state of the field's understanding of cases of intellectual abilities and disabilities. A point of view on the Chinese initiative as presented in the CNN electronic publication is described. The chapter describes the major concepts that have been and are used to explore the connection between the genes and intelligence. The evidence pertaining to observations that the genome is a major source of the variations in individuals' intellectual abilities and disabilities is discussed. Studies of various indicators of information processing speed have been prominent in the field of intelligence due to the observation that these indicators reliably correlate with various aspects of intelligence, especially, with the g factor.


Adler, L. L. (Ed.). (1993). International handbook on gender roles. Westport, CT: Greenwood.
Allen, L. S., Richey, M. F., Chai, Y. M., & Gorski, R. A. (1991). Sex differences in the corpus callosum of the living human being. Journal of Neuroscience, 11, 933–942.
Allport, G. W., Vernon, P. E., & Lindzey, G. (1970). Manual for the study of values (3rd ed.). Boston, MA: Houghton Mifflin.
American Association of University Women. (1992). The AAUW Report: How schools shortchange girls. New York, NY: Marlowe.
Arden, R., & Plomin, R. (2006). Sex differences in variance of intelligence across childhood. Personality and Individual Differences, 41, 39–48.
Astin, A., Sax, L., Korn, W., & Mahoney, K. (1995). The American freshman: National norms for fall 1995. Los Angeles, CA: Higher Education Research Institute.
Baenninger, M., & Newcombe, N. (1989). The role of experience in spatial test performance: A meta-analysis. Sex Roles, 20, 327–344.
Baker, D. P., & Jones, D. P. (1992). Opportunity and performance: A sociological explanation for gender differences in academic mathematics. In J. Wrigley (Ed.), Education and gender equality (pp. 193–206). London, UK: Falmer Press.
Banaji, M. R., & Hardin, C. D. (1996). Automatic stereotyping. Psychological Science, 7, 136–141.
Bandura, A. (1977). Social learning theory. Englewood Cliffs, NJ: Prentice-Hall.
Barnes, L. L., Wilson, R. S., Schneider, J. A., Bienas, J. L., Evans, D. A., & Bennett, D. A. (2003). Gender, cognitive decline, and risk of AD in older persons. Neurology, 60, 1777–1781.
Bayer, U., & Erdmann, G. (2008). The influence of sex hormones on functional cerebral asymmetries in postmenopausal women. Brain and Cognition, 67, 140–149.
Begley, S. (1994, March 21). The estrogen complex. Newsweek, pp. 76–77.
Beilstein, C. D., & Wilson, J. F. (2000). Landmarks in route learning by girls and boys. Perceptual & Motor Skills, 91, 877–882.
Benbow, C. P., & Stanley, J. C. (1983). Sex differences in mathematical reasoning ability: More facts. Science, 222, 1029–1030.
Berenbaum, S. A., Korman, K., & Leveroni, C. (1995). Early hormones and sex differences in cognitive abilities [Special issue]. Learning and Individual Differences, 7, 303–321.
Blackburn, C. C. (2004, May). Developing exceptional talent: Descriptive characteristics of highly precocious mathematical and verbal reasoners. Paper presented at the Seventh Biennial Henry B. & Joycelyn Wallace National Research Symposium on Talent Development, University of Iowa, Iowa City.
Blair, C., Granger, D., & RazzamR. P. (2005). Cortisol reactivity is positively related to executive function in preschool children attending Head Start. Child Development, 76, 554–567.
Blair, I. V., & Banaji, M. R. (1996). Automatic controlled processes in stereotype priming. Journal of Personality and Social Psychology, 70, 1142–1163.
Brody, N. (1992). Intelligence (2nd ed.). New York, NY: Academic Press.
Buss, D. M. (1995). Psychological sex differences: Origins through sexual selection. American Psychologist, 50, 164–168.
Ceci, S. J. (1990). On intelligence…more or less. A bio-ecological treatise on intellectual development. Englewood Cliffs, NJ: Prentice-Hall.
Cherney, I. D. (2008). Mom, let me play more computer games: They improve my mental rotation skills. Sex Roles, 59, 776–786.
Collaer, M. L., & Hines, M. (1995). Human behavioral sex differences: A role for gonadal hormones during early development? Psychological Bulletin, 118, 55–107.
College Entrance Examination Board. (2004). 2004 college-bound seniors: A profile of SAT program test takers. Retrieved June 21, 2009, from
Colom, R., Juan-Espinosa, M., Abad, F. & García, L. F. (2000). Negligible sex differences in general intelligence, Intelligence, 28, 57–68.
Corbett, C., Hill, C., & St. Rose, A. (2008). Where the girls are: The facts about gender equity in education. Washington, DC: American Association of University Women.
Davies, A. P. C., & Sheckelford, T. K. (2006, September). An evolutionary psychological perspective on gender similarities and differences. American Psychologist, 640–641.
Davies, P. G., Spencer, S. J., & Steele, C. M. (2005). Clearing the air: Identity safety moderates the effects of stereotype threat on women's leadership aspirations. Journal of Personality and Social Psychology, 88, 276–287.
Dickens, W. T., & Flynn, J. R. (2001). Heritability estimates versus large environmental effcts: The IQ paradox. Psychological Review, 108, 346–369.
Duckworth, A. L., & Seligman, M. E. P. (2006). Self-discipline gives girls the edge: Gender in self-discipline, grades, and achievement test scores. Journal of Educational Psychology, 98, 198–208.
Dykiert, D., Gale, C. R., & Deary, I. J. (2008). Are apparent sex differences in mean IQ scores created in part by sample restriction and increased male variance?Intelligence, 37, 42–47.
Eals, M., & Silverman, I. (1994). The hunter-gatherer theory of spatial sex differences: Proximate factors mediating the female advantage in recall of object arrays. Ethology and Sociobiology, 15, 95–105.
Eccles, J. S. (1987). Gender roles and women's achievement-related decisions. Psychology of Women Quarterly, 11, 135–172.
Feng, J., Spence, I., & Pratt, J. (2007). Playing an action video game reduces gender differences in spatial cognition. Psychological Science, 18, 850–855.
Frenzel, A. C., Pekrun, R., & Goetz, T. (2007). Girls and mathematics – A “hopeless” issue? A control-value approach to gender differences in emotions towards mathematics. European Journal of Psychology of Education, 22, 497–514.
Geary, D. C. (1996). Sexual selection and sex differences in mathematical abilities. Behavioral and Brain Sciences, 19, 229–284.
Geary, D. C. (2007). Educating the evolved mind: Conceptual foundations for an evolutionary educational psychology. In J. S. Carlson & J. R. Levin (Eds.), Educating the evolved mind (pp. 1–100). Greenwich, CT: Information Age.
Geiser, C., Lehmann, W., & Eid, M. (2008). A note on sex differences in mental rotation in different age groups. Intelligence, 36, 556–563.
Gerstorf, D., Herlitz, A., & Smith, J. (2006). Stability of sex differences in cognition in advanced old age: The role of education and attrition. Journal of Gerontology: Psychological Sciences and Social Sciences, 61, 245–249.
Giedd, J. N., Castellanos, F. X., Rajapakse, J. C., Vaituzis, A. C., & Rapoport, J. L. (1997). Sexual dimorphism of the developing human brain. Progress in Neuropsychopharmacology & Biological Psychiatry, 21, 1185–1901.
Greene, J. P., & Winters, M. A. (2006). Leaving boys behind: Public high school graduation rates (Civic Report 48). Retrieved June 7, 2009, from
Greenwald, A. G., & Banaji, M. R. (1995). Implicit social cognition: Attitudes, self-esteem, and stereotypes. Psychological Review, 102, 4–27.
Gur, R. C., Alsop, D., Glahn, D., Petty, R., Swanson, C. L., Maldjian, J. A., et al. (2000). An fMRI study of sex differences in regional activation to a verbal and a spatial task. Brain and Language, 74, 157–170.
Gur, R. C., Turetsky, B. I., Matsui, M., Yan, M., Bilker, W., Hughett, P., & Gur, R. E. (1999). Sex differences in brain gray and white matter in healthy young adults: Correlations with cognitive performance. Journal of Neuroscience, 19, 4065–4072.
Halpern, D. F. (in press). Sex differences in cognitive abilities (4th ed.). New York, NY: Psychology Press.
Halpern, D. F., Benbow, C., Geary, D., Gur, D., Hyde, J., & Gernsbacher, M. A. (2007). The science of sex-differences in science and mathematics. Psychological Science in the Public Interest, 8, 1–52.
Halpern, D. F., & Tan, U. (2001). Stereotypes and steroids: Using a psychobiosocial model to understand cognitive sex differences. Brain and Cognition, 45, 392–414.
Hampson, E. (1990). Estrogen-related variations in human spatial and articulatory-motor skills. Psychoneuroendocrinology, 15, 97–111.
Hampson, E., & Kimura, D. (1988). Reciprocal effects of hormonal fluctuations on human motor and perceptual-spatial skills. Behavioral Neuroscience, 102, 456–459.
Harris, J. R. (1995). Where is the child's environment? A group socialization theory of development. Psychological Review, 102, 458–489.
Hedges, L. V., & Nowell, A. (1995). Sex differences in mental test scores, variability, and numbers of high-scoring individuals. Science, 269, 41–45.
Herman, R. A., & Wallen, K. (2007). Cognitive performance in rhesus monkeys varies by sex and prenatal androgen exposure. Hormones and Behavior, 51, 496–507.
Hunt, E., & Madhyastha, T. (2008). Recruitment modeling: An analysis and an application to the study of male-female differences in intelligence. Intelligence, 36, 653–663.
Hyde, J. S. (2005). The gender similarity hypothesis. American Psychologist, 60, 581–592.
Hyde, J. S., Fennema, E., & Lamon, S. J. (1990). Gender differences in mathematics performance: A meta-analysis. Psychological Bulletin, 107, 139–155.
Hyde, J. S., Lindberg, S. M., Linn, M. C., Ellis, A. B., & Williams, C. C. (2008). Gender similarities characterize math performance. Science, 321, 494–495.
Imperato-McGinley, J., Pichardo, M., Gautier, T., Voyer, D., & Bryden, M. P. (1991). Cognitive abilities in androgen insensitive subjects – Comparison with control males and females from the same kindred. Clinical Endocrinology, 34, 341–347.
Innocenti, G. M. (1994). Some new trends in the study of the corpus callosum. Behavioral and Brain Research, 64, 1–8.
Irwing, P., & Lynn, R. (2005). Intelligence: Is there a difference in IQ scores?Nature, 438, 31–32.
Jancke, L., & Steinmetz, H. (1994). Interhemispheric-transfer time and corpus callosum size. Neuroreport, 5, 2385–2388.
Jensen, A. R. (1998). The g factor: The science of mental ability. New York, NY: Praeger.
Johnson, W., & Bouchard, T. J. (2006). Sex differences in mental abilities: g masks the dimensions on which they lie. Intelligence, 35, 23–59.
Johnson, W., Carothers, A., & Deary, I. J. (2008). Sex differences in variability in general intelligence: A new look at an old question. Perspectives on Psychological Science, 3, 518–531.
Johnson, W., Carothers, A., & Deary, I. J. (2009). A role for the X chromosome in sex differences in variability in general intelligence?Perspectives in Psychological Science, 4, 598–611.
Jost, J. T., & Kay, A. C. (2005). Exposure to benevolent sexism and complementary gender stereotypes: Consequences for specific and diffuse forms of system justification. Journal of Personality and Social Psychology, 88, 498–509.
Jussim, L., & Eccles, J. S. (1992). Teacher expectations: II. Construction and reflection of student achievement. Journal of Personality and Social Psychology, 63, 947–961.
Karpiak, C. P., Buchanan, J. P., Hosey, M., & Smith., A. (2007). University students from single-sex and coeducational high schools: Differences in majors and attitudes at a Catholic university. Psychology of Women Quarterly, 31, 282–289.
Kaufman, S. B. (2007). Sex differences in mental rotation and spatial visualization ability: Can they be accounted for by differences in working memory capacity?Intelligence, 35, 211–223.
Kiefer, A. K., & Sekaquaptewa, D. (2007). Implicit stereotypes, gender identification, and math-related outcomes: A prospective study of female college students. Psychological Science, 18, 13–18.
Killgore, W. D., & Killgore, D. B. (2007). Morningness-eveningness correlates with verbal ability in women but not men. Perceptual and Motor Skills, 104, 33–338.
Kimball, M. M. (1989). A new perspective on women's mathematics achievement. Psychological Bulletin, 105, 198–214.
Kimura, D. (1993). Neuromotor mechanisms in human communication. New York, NY: Oxford University Press.
Kimura, D. (1996). Sex, sexual orientation and sex hormones influence human cognitive function. Current Opinion in Neurobiology, 6, 259–263.
Kimura, D., & Hampson, E. (1994). Cognitive pattern in men and women is influenced by fluctuations in sex hormones. Psychological Science, 3, 57–61.
Kucian, K., Loenneker, T., Dietrich, T., Martin, E., & von Aster, M. (2005). Gender differences in brain activation patterns during mental rotation and number related cognitive tasks. Psychology Science, 47, 112–131.
Kurdek, L. A., & Sinclair, R. J. (2000). Psychological, family, and peer predictors of academic outcomes in first- through fifth-grade children. Journal of Educational Psychology, 92, 449–457.
LeBlanc, E. S., Janowsky, J., Chan, B. K., & Nelson, H. D. (2001). Hormone replacement therapy and cognition: Systematic review and metaanalysis. Journal of American Medical Association, 285, 1489–1499.
Levine, S. C., Huttenlocher, J., Tayler, A., & Langrock, A. (1999). Early sex differences in spatial skill. Developmental Psychology, 35, 940–949.
Linn, M. C., & Petersen, A. C. (1985). Emergence and characterization of sex differences in spatial ability: A meta-analysis. Child Development, 56, 1479–1498.
Loring-Meier, S., & Halpern, D. F. (1999). Sex differences in visual-spatial working memory: Components of cognitive processing. Psychonomic Bulletin & Review, 6, 464–471.
Lott, B., & Maluso, D. (1993). The social learning of gender. In A. E. Beall & R. Sternberg (Eds.), The psychology of gender (pp. 99–123). New York, NY: Guilford Press.
Low, L.-F., & Ansley, K. J. (2006). Hormone replacement therapy and cognitive performance in postmenopausal women – a review by cognitive domain. Neuroscience and Biobehavioral Reviews, 30, 66–84.
Lubinski, D., Schmidt, D. B., & Benbow, C. P. (1996). A 20-year stability analysis of the Study of Values for intellectually gifted individuals from adolescence to adulthood. Journal of Applied Psychology, 81, 443–451.
Lueptow, L. B., Garovich, L., & Lueptow, M. B. (1995). The persistence of gender stereotypes in the face of changing sex roles: Evidence contrary to the sociocultural model. Ethology & Sociobiology, 16, 509–530.
Luine, V. N. (2008). Sex steroids and cognitive function. Journal of Neuroendocrinology, 20, 866–872.
Lutchamaya, S., Baron-Cohen, S., & Raggatt, P. (2002). Foetal testosterone and vocabulary size in 18- and 24-month-old infants. Infant Behavior and Development, 24, 418–424.
Lytton, H., & Romney, D. M. (1991). Parents’ differential socialization of boys and girls: A meta-analysis. Psychological Bulletin, 109, 267–296.
Maguire, E. A., Frackowiak, R. S. J., & Frith, C. D. (1997). Recalling routes around London: Activation of the right hippocampus in taxi drivers. Journal of Neuroscience, 17, 7103–7110.
Maguire, E. A., Gadian, D. G., Johnsrude, I. S., Ashburner, C. D., Frackowiak, R. S. J., & Frith, C. D. (2000). Navigation-related structural change in the hippocampi of taxi drivers. Proceedings of the National Academy of Science, USA, 97, 4398–4403.
Maitland, S. B., Intrieri, R. C., Schaie, K. W., & Willis, S. L. (2000). Gender differences and changes in cognitive abilities across the adult life span. Aging, Neuropsychology, and Cognition, 7, 32–53.
Masters, M. S., & Sanders, B. (1993). Is the gender difference in mental rotation disappearing? Behavior Genetics, 23, 337–341.
Moffat, S. D., & Hampson, E. (1996). A curvilinear relationship between testosterone and spatial cognition in humans: Possible influence of hand preference. Psychoneuroendocrinology, 21, 323–337.
Moore, D. S., & Johnson, S. P. (2008). Mental rotation in human infants: A sex difference. Psychological Science, 19, 1063–1066.
Mueller, S. C., Temple, V., Oh, E., VanRyzin, C., Williams, A., Cornwell, B., Grillon, C., Pine, D. S., Ernst, D. S. & Merke, D. P. (2008). Early androgen exposure modulates spatial cognition in congenital adrenal hyperplasia. Psychoneuroendocrinology, 33, 973–980.
National Assessment of Educational Progress. (2008). The nation's report card: Writing 2007. Retrieved May 27, 2009, from
National Center for Education Statistics. (2005). Highlights for the Trends in International Mathematics and Science Study (TIMSS,) 2003. Retrieved May 27, 2009, from
National Science Board. (2006). New formulas for America's workforce 2: Girls in science and engineering (NSF 06–60). Retrieved June 21, 2009, from
Neave, N., Menaged, M., & Weightman, D. R. (1999). Sex differences in cognition: The role of testosterone and sexual orientation. Brain and Cognition, 41, 245–262.
Nosek, B. A., et al. (2009). National differences in gender-science stereotypes predict national sex differences in science and math achievement. Proceedings of the National Academy of Science, 106, 10593–10597.
Nyborg, H. (2005). Sex-related differences in general intelligence g, brain size, and social status. Personality and Individual Differences, 39, 497–509.
Ostatníková, D., Dohnányiová, M., Laznibatová, J., Putz, Z., & Celec, P. (2001). Fluctuations of salivary testosterone level in relation to cognitive performance. Homeostasis in Health and Disease, 41, 51–53.
Ostatníková, D., Laznibatová, J., Putz, Z., Mataseje, A., Dohnányiová, M., & Pastor, K. (2000). Salivary testosterone levels in intellectually gifted and non-intellectually gifted preadolescents: An exploratory study. High Ability Studies, 11, 41–54.
Oswald, D. L. (2008). Gender stereotypes and women's reports of liking and ability in traditionally masculine and feminine occupations. Psychology of Women Quarterly, 32, 196–203.
Posner, M. I., & Raichle, M. E. (1994). Images of mind. New York, NY: Freeman.
Quinn, P. C., & Liben, L. S. (2008). A sex difference in mental rotation in young infants. Psychological Science, 19, 1067–1070.
Rampey, B. D., Dion, G. S., & Donahue, P. L. (2009). NAEP trends in academic progress (NCES 2009–479). National Center for Education Statistics, Institute of Education Sciences, U.S. Department of Education, Washington, DC.
Räty, H., Kasanen, K., Kiiskinen, J., & Nykky, M. (2004). Learning intelligence: Children's choices of the best pupils in the mother tongue and mathematics. Social Behavior and Personality, 32, 303–312.
Read, S., Pedersen, N. L., Gatz, M., Berg, S., Vuoksimaa, E., Malmberg, B., Johansson, B., & McClearn, G. E. (2006). Sex differences after all those years? Heritability of cognitive abilities in old age. Journals of Gerontology, 61, 137–143.
Reinisch, J. M., & Sanders, S. A. (1992). Prenatal hormonal contributions to sex differences in cognitive and personality development. In A. A. Gerall, H. Moltz, & I. I. Ward (Eds.), Sexual differentiation: Vol. 11. Handbook of behavioral neurobiology (pp. 221–243). New York, NY: Plenum.
Ryan, J., Carriere, I., Scali, J., Ritchie, K., & Ancelin, M-L. (2009). Life-time estrogen exposure and cognitive functioning in later life. Psychoneuroendocrinology, 34, 287–298.
Sadker, M., & Sadker, D. (1995). Failing at fairness: How our schools cheat girls. New York, NY: Touchstone.
Schmidt, F. L., & Hunter, J. (2004). General mental ability in the world of work: Occupational attainment and job performance. Journal of Personality and Social Psychology, 86, 162–173.
Shah, P., & Miyake, A. (1996). The separability of working memory resources for spatial thinking and language processing: An individual differences approach. Journal of Experimental Psychology, 125, 4–27.
Shaywitz, B. A., Shaywitz, S. E., Pugh, K. R., Constable, R. T., Skudlarski, P., Fulbright, R. K., Bronen, R. A., Fletcher, J. M., Shankweller, D. P., Katz, L., & Gore, J. C. (1995). Sex differences in the functional organization of the brain for language. Nature, 373, 607–609.
Sherwin, B. (2003). Estrogen and cognitive functioning in women. Endocrine Reviews, 24, 133–151.
Skuse, D. (2005). X-linked genes and mental functioning. Human Molecular Genetics, 14, R27–R32.
Snyder, T. D., Dillow, S. A., & Hoffman, C. M. (2009). Digest of Education Statistics 2008 (NCES 2009–020). National Center for Education Statistics, Institute of Educational Sciences, U. S. Department of Education. Washington, DC. Table 149.
Sommers, C. H. (2000, May). The war against boys. Atlantic. Retrieved June 11, 2009, from
Sorby, S. J., & Baartmans, B. J. (1996). The development and assessment of a course for enhancing the 3-D spatial visualization skills of first year engineering students. Engineering Design Graphics Journal, 60, 13–20.
Spelke, E. S. (2005). Sex difference in intrinsic aptitude for mathematics and science? A critical review. American Psychologist, 60, 950–958.
Spinath, F. M., Spinath, B., & Plomin, R. (2008). The nature and nurture of intelligence and motivation in the origins of sex differences in elementary school achievement. European Journal of Personality, 22, 211–229.
Stake, J. E., & Nickens, S. D. (2005). Adolescent girls’ and boys’ science peer relationships and perceptions of the possible self as scientist. Sex Roles, 52, 1–12.
Steele, C. M. (1997). A threat in the air: How stereotypes shape intellectual identity and performance. American Psychologist, 52, 613–629.
Steele, J. R., & Ambady, N. (2006). “Math is hard!” The effect of gender priming on women's attitudes. Journal of Experimental Social Psychology, 42, 428–436.
Steele, C. M., & Aronson, J. (1995). Stereotype threat and the intellectual test performance of African Americans. Journal of Personality and Social Psychology, 69, 797–811.
Steinmetz, H., Staiger, J. F., Schluag, G., Huang, Y., & Jancke, L. (1995). Corpus callosum and brain volume in women and men. Neuroreport, 6, 1002–1004.
Straube, E., Straube, W., Krüger, E., Bradatsch, M., Jacob-Meisel, M., & Rose, H. (1999). Disruption of male sex hormones with regard to pesticides: Pathophysiology and regulatory aspects. Toxicology Letters, 107, 225–231.
Stumpf, H., & Stanley, J. C. (1996). Gender-related differences on the College Board's advanced placement and achievement tests, 1982–1992. Journal of Educational Psychology, 88, 353–364.
Study of Mathematically Precocious Youth. (2006). Retrieved June 23, 2009, from
Terlecki, M. S. (2005). The effects of long-term practice and training on mental rotation. Dissertation Abstracts International, 65(10-B), 5434.
Torres, A., Gómez-Gil, E., Vidal, A., Puig, O., Boget, T., & Salamero, M. (2006). Gender differences in cognitive functions and the influence of sexhormones. Actas Españolas de Psyiquiatria, 34, 408–415.
Turkheimer, E., & Halpern, D. F. (in press). Sex differences in variability for cognitive measures: Do the ends justify the genes? Perspectives in Psychological Science.
U. S. Department of Education. (1997). National assessment of educational progress (Indicator 32: Writing Proficiency; prepared by the Educational Testing Service). Retrieved May 27, 2009, from
U. S. Department of Education, Office of Planning, Evaluation and Policy Development, Policy and Program Studies Research. (2005). Single-sex versus coeducational schooling: A systematic review. Washington, DC: Author.
van Exel, E., Gussekloo, J., de Craen, A. J. M., Bootsma-van der Wiel, A., Houx, P., Knook, D. L., & Westendorp, R. G. J. (2001). Cognitive function in the oldest old: Women perform better than men. Journal of Neurology, Neurosurgery, & Psychiatry, 71, 29–32.
Viner, K. (1994). Issues. Cosmopolitan, p. 105.
Volkman, F., Szatmari, P., & Sparrow, S. (1993). Sex differences in pervasive developmental disabilities. Journal of Autism and Developmental Disabilities, 23, 579–591.
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, 412–423.
Willingham, W. W., & Cole, N. S. (1997). Gender and fair assessment. Mahwah, NJ: Erlbaum.