Article
Increased heritability for lower IQ levels?
Behavior genetics - 1 Jul 1991
Bailey J M, Revelle W
Abstract excerpt
Detterman et al. (1990) presented evidence based on twins that the heritability of IQ may be higher in the lower part of the IQ range. We first offer an alternative test for differential heritability across the IQ range, based on the analysis of absolute intrapair differences of monozygotic versus dizygotic twins. We then review two previous studies, each containing more twins than the sample of Detterman et al.,...
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