The Nature and Nurture of High IQ-Reference-Cited by-同舟云学术

The Nature and Nurture of High IQ

Published:2013-07-01 Issue:8 Volume:24 Page:1487-1495
ISSN:0956-7976
Container-title:Psychological Science
language:en
Short-container-title:Psychol Sci

Author:

Brant Angela M.¹²,Munakata Yuko²,Boomsma Dorret I.³,DeFries John C.⁴,Haworth Claire M. A.⁵,Keller Matthew C.⁴,Martin Nicholas G.⁶,McGue Matthew⁷,Petrill Stephen A.⁸,Plomin Robert⁵,Wadsworth Sally J.⁴,Wright Margaret J.⁶,Hewitt John K.⁴

Affiliation:

1. Department of Psychology, The Pennsylvania State University

2. Department of Psychology and Neuroscience, University of Colorado at Boulder

3. Department of Biological Psychology, VU University Amsterdam

4. Institute for Behavioral Genetics, University of Colorado at Boulder

5. MRC Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s College London

6. Queensland Institute of Medical Research, Royal Brisbane Hospital, Herston, Queensland, Australia

7. Psychology Department, University of Minnesota

8. Department of Human Development and Family Science, The Ohio State University

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.

Publisher

SAGE Publications

Subject

General Psychology

Link

http://journals.sagepub.com/doi/pdf/10.1177/0956797612473119

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