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Literature DB >> 23818653

The nature and nurture of high IQ: an extended sensitive period for intellectual development.

Angela M Brant¹, Yuko Munakata, Dorret I Boomsma, John C Defries, Claire M A Haworth, Matthew C Keller, Nicholas G Martin, Matthew McGue, Stephen A Petrill, Robert Plomin, Sally J Wadsworth, Margaret J Wright, John K Hewitt.

Abstract

IQ predicts many measures of life success, as well as trajectories of brain development. Prolonged cortical thickening observed in individuals with high IQ might reflect an extended period of synaptogenesis and high environmental sensitivity or plasticity. We tested this hypothesis by examining the timing of changes in the magnitude of genetic and environmental influences on IQ as a function of IQ score. We found that individuals with high IQ show high environmental influence on IQ into adolescence (resembling younger children), whereas individuals with low IQ show high heritability of IQ in adolescence (resembling adults), a pattern consistent with an extended sensitive period for intellectual development in more-intelligent individuals. The pattern held across a cross-sectional sample of almost 11,000 twin pairs and a longitudinal sample of twins, biological siblings, and adoptive siblings.

Entities: CellLine Chemical Disease Species

Keywords: behavior genetics; cognitive ability; cognitive development; individual differences; intelligence

Mesh：

Year: 2013 PMID： 23818653 PMCID： PMC4511162 DOI： 10.1177/0956797612473119

Source DB: PubMed Journal: Psychol Sci ISSN： 0956-7976

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