Explaining the Increasing Heritability of Cognitive Ability Across Development A Meta-Analysis of Longitudinal Twin and Adoption Studies

被引:131
作者
Briley, Daniel A. [1 ]
Tucker-Drob, Elliot M.
机构
[1] Univ Texas Austin, Dept Psychol, Austin, TX 78712 USA
关键词
behavior genetics; cognition; intelligence; development; amplification; childhood development; cognitive ability; INTELLIGENCE; ENVIRONMENT; PHENOTYPES; CHILDHOOD; GENETICS; AGE;
D O I
10.1177/0956797613478618
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
Genes account for increasing proportions of variation in cognitive ability across development, but the mechanisms underlying these increases remain unclear. We conducted a meta-analysis of longitudinal behavioral genetic studies spanning infancy to adolescence. We identified relevant data from 16 articles with 11 unique samples containing a total of 11,500 twin and sibling pairs who were all reared together and measured at least twice between the ages of 6 months and 18 years. Longitudinal behavioral genetic models were used to estimate the extent to which early genetic influences on cognition were amplified over time and the extent to which innovative genetic influences arose with time. Results indicated that in early childhood, innovative genetic influences predominate but that innovation quickly diminishes, and amplified influences account for increasing heritability following age 8 years.
引用
收藏
页码:1704 / 1713
页数:10
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