Article
Increasing phenotypic and genetic variations in hyperactivity/inattention problems from age 3 to 13 years: a cross-sectional twin study.
Twin research and human genetics : the official journal of the International Society for Twin Studies - 1 Dec 2014
Hur Yoon-Mi
Abstract excerpt
A twin design was used to examine the developmental nature of genetic, environmental, and phenotypic variations in hyperactivity and inattention problems (HIP). Mothers of 662 complete pairs of twins (273 monozygotic [MZ] pairs and 389 dizygotic [DZ] pairs) aged from 3 to 13 years (mean [SD] age = 8.3 [2.9] years) responded to the items of the HIP scale of the Strengths and Difficulties questionnaire via a...
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