Sex Differences in Cognition: Evidence from the Hawaii Family Study
Since 1972 we have been collecting family data in Hawaii in order to study the genetic and environmental bases of human cognition. Although data collection is now complete, it will be some time before all tests are scored and all laboratory measures are analyzed. Individual scores from the first three years of the study are available now, however, and they constitute a large and sufficient data set for many kinds of psychometric analyses. Planned analyses include the estimation of heritabilities and genetic correlations of scores on selected cognitive tests; a comparison of phenotypic and genetic cognitive factor structures; estimations of the effects of inbreeding, assortative mating, parental age, birth order, certain maternal-fetal interactions, and certain socioeconomic variables; a search for possible relationships between cognitive traits and genetic markers and between cognitive and dermatoglyphic traits; and investigations of possible heterosis, dominance, or epistasis in components of cognitive abilities. For this chapter, in honor of Frank Beach, we searched for sex differences in cognitive test performance.
KeywordsMental Rotation Verbal Fluency Spatial Ability Spatial Visualization Perceptual Speed
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