Abstract
Abstract The concept of heritability in quantitative genetics is defined and discussed in terms of its implications for individual and group differences in behavioral traits, with particular reference to studies of the heritability of IQ. Common misconceptions concerning the relevance of heritability analysis for individual scores and the roles of genotype x environment covariance and interaction are clarified. Some of the popular criticisms of heritability analysis as applied to mental ability are shown to be misconceived.
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