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Longitudinal Stability of Cognitive Ability from Infancy to Early Childhood: Genetic and Environmental Etiologies

Michele C. LaBuda, J. C. DeFries, Robert Plomin and D. W. Fulker
Child Development
Vol. 57, No. 5 (Oct., 1986), pp. 1142-1150
Published by: Wiley on behalf of the Society for Research in Child Development
DOI: 10.2307/1130438
Stable URL: http://www.jstor.org/stable/1130438
Page Count: 9
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Longitudinal Stability of Cognitive Ability from Infancy to Early Childhood: Genetic and Environmental Etiologies
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Abstract

A path model of genetic and shared family environmental transmission was fitted to general cognitive ability data from 1-, 2-, 3-, and 4-year-old adopted and nonadopted children and their parents in order to assess the etiology of longitudinal stability from infancy to early childhood. Stability across years is moderate and is due mainly to influences not predicted by parental IQ. Results of the present study, in conjunction with those of previous twin studies, suggest substantial genetic stability from infancy and early childhood to adulthood.

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