The Nature and Nurture of High IQ: An Extended Sensitive Period for Intellectual Development

A.M. Brant; Y. Munakata; D.I. Boomsma; J.C. DeFries; C.M.A. Haworth; M.C. Keller; N.G. Martin; M. McGue; S.A. Petrill; R. Plomin; S.J. Wadsworth; M.J. Wright; J.K. Hewitt

doi:10.1177/0956797612473119

The Nature and Nurture of High IQ: An Extended Sensitive Period for Intellectual Development

A.M. Brant, Y. Munakata, D.I. Boomsma, J.C. DeFries, C.M.A. Haworth, M.C. Keller, N.G. Martin, M. McGue, S.A. Petrill, R. Plomin, S.J. Wadsworth, M.J. Wright, J.K. Hewitt

Biological Psychology

Research output: Contribution to Journal › Article › Academic › peer-review

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. © The Author(s) 2013.

Original language	English
Pages (from-to)	1487-1495
Journal	Psychological Science
Volume	24
Issue number	8
Early online date	1 Jul 2013
DOIs	https://doi.org/10.1177/0956797612473119
Publication status	Published - 2013

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Brant, A. M., Munakata, Y., Boomsma, D. I., DeFries, J. C., Haworth, C. M. A., Keller, M. C., Martin, N. G., McGue, M., Petrill, S. A., Plomin, R., Wadsworth, S. J., Wright, M. J., & Hewitt, J. K. (2013). The Nature and Nurture of High IQ: An Extended Sensitive Period for Intellectual Development. Psychological Science, 24(8), 1487-1495. https://doi.org/10.1177/0956797612473119

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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. {\textcopyright} The Author(s) 2013.",

author = "A.M. Brant and Y. Munakata and D.I. Boomsma and J.C. DeFries and C.M.A. Haworth and M.C. Keller and N.G. Martin and M. McGue and S.A. Petrill and R. Plomin and S.J. Wadsworth and M.J. Wright and J.K. Hewitt",

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AU - Brant, A.M.

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AU - Boomsma, D.I.

AU - DeFries, J.C.

AU - Haworth, C.M.A.

AU - Keller, M.C.

AU - Martin, N.G.

AU - McGue, M.

AU - Petrill, S.A.

AU - Plomin, R.

AU - Wadsworth, S.J.

AU - Wright, M.J.

AU - Hewitt, J.K.

PY - 2013

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N2 - 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. © The Author(s) 2013.

AB - 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. © The Author(s) 2013.

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DO - 10.1177/0956797612473119

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JO - Psychological science

JF - Psychological science

IS - 8

ER -

The Nature and Nurture of High IQ: An Extended Sensitive Period for Intellectual Development

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