Article Abstract:
A study was conducted to verify contradictory findings of earlier twin studies on the genetic origins of depressive symptoms. Data from the Colorado Adoption Project on 180 adopted children and their biological and adoptive mothers, and on 227 nonadopted children and their mothers were analyzed two adoption designs, namely the sibling design and the parent-offspring design. The findings indicate that genetic influence on depressive symptoms in children may be weaker than suggested by previous studies.
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Article Abstract:
There is evidence for genetic factors operating on measures of family environments, according to research designed to estimate genetic and environmental sources of variance in family environments. Among parents' reports of their own behaviours towards each child, genetic variance was identified for the emotional elements but not for the control element. It is possible that the emotional element of parent-child relationships is partly influenced by child effects on parental affect.
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Article Abstract:
Dissociative experiences like amnesia are an important cognitive component of individuals coping with trauma and to identify problems better, genetic and environmental sources of variance in these behaviors were studied. Developmentally there was no change in mean dissociation across middle childhood and adolescence whereas in some there was a moderate amount of genetic and non-shared environmental variance but more research is needed on the subject.
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