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Behav Genet. 2007 Mar;37(2):273-83. Epub 2006 Sep 15.

Genotype by environment interaction in adolescents' cognitive aptitude.

Author information

  • 1Department of Psychology, University of Virginia, P.O. Box 400400, Charlottesville, VA 22904, USA. kph3k@virginia.edu

Abstract

In a replication of Turkheimer, Haley, Waldron, D'Onofrio, Gottesman II (2003, Socioeconomic status modifies heritability of IQ in young children. Psychological Science, 14:623-628), we investigate genotype-environment (G x E) interaction in the cognitive aptitude of 839 twin pairs who completed the National Merit Scholastic Qualifying Test in 1962. Shared environmental influences were stronger for adolescents from poorer homes, while genetic influences were stronger for adolescents from more affluent homes. No significant differences were found between parental income and parental education interaction effects. Results suggest that environmental differences between middle- to upper-class families influence the expression of genetic potential for intelligence, as has previously been suggested by Bronfenbrenner and Ceci's (1994, Nature-nurture reconceptualized in developmental perspective: a bioecological model Psychological Review, 101:568-586) bioecological model.

PMID:
16977503
[PubMed - indexed for MEDLINE]
PMCID:
PMC2903846
Free PMC Article

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