Article
Genetic and environmental mechanisms underlying stability and change in problem behaviors at ages 3, 7, 10, and 12.
Developmental psychology - 1 Sept 2004
Bartels M, van den Oord E J C G, Hudziak J J, Rietveld M J H, van Beijsterveldt C E M, Boomsma D I
Abstract excerpt
Maternal ratings on internalizing (INT) and externalizing (EXT) behaviors were collected in a large, population-based longitudinal sample. The numbers of participating twin pairs at ages 3, 7, 10, and 12 were 5,602, 5,115, 2,956, and 1,481, respectively. Stability in both behaviors was accounted for by genetic and shared environmental influences. The genetic contribution to stability (INT: 43%; EXT: 60%) resulted...
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