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Childhood hyperactivity scores are highly heritable and show sibling competition effects: Twin study evidence

Physical DevelopmentChild PsychologyBehavioral SciencesEarly Childhood DevelopmentEducationSocial SciencesChildhood Hyperactivity ScoresBehavioral IssueDevelopmental DisorderSibling Competition EffectsTwin Study EvidencePsychologyChild DevelopmentDevelopmental Psychology