Article
Longitudinal genetic analysis of problem behaviors in biologically related and unrelated adoptees.
Behavior genetics - 1 Sept 1998
van der Valk J C, Verhulst F C, Neale M C, Boomsma D I
Abstract excerpt
The genetic and environmental influences on problem behaviors at two assessment points, three years apart, and their stability were studied in a sample of international adoptees, initially aged 10 to 15 years. Parents of 111 pairs of adopted biological siblings, 221 pairs of adopted nonbiological siblings and 1484 adopted singletons completed the Child Behavior Checklist (75 pairs, 154 pairs and 1080 singletons...
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