Elucidating the genetic and environmental aetiology of effortful control (mother and father reports at two time points), attentional control (observer reports), and their associations with internalizing and externalizing symptoms (mother and father reports) is the central focus of this paper. With a sample of twins in middle childhood…

Background: Individual differences in conduct problems arise in part from proneness to anger/frustration and poor self-regulation of behavior. However, the genetic and environmental etiology of these connections is not known. Method: Using a twin design, we examined genetic and environmental covariation underlying the well-documented correlations…