This study examined the prospective links between maladaptive anger regulation and aggressive behavior in middle childhood over a 10-month period, analyzing the mediating influence of peer problems. Participants were 599 elementary school children in Germany, aged 6-10 years at Time 1 (T1) and 7-11 years at Time 2 (T2). Anger regulation at T1 was…

Theory of mind is one of the most important cognitive factors in social information-processing, and deficits in theory of mind have been linked to aggressive behavior in childhood. The present longitudinal study investigated reciprocal links between theory of mind and two forms of aggression--physical and relational--in middle childhood with three…

Being surrounded by peers who are accepting of aggression is a significant predictor of the development and persistence of aggression in childhood and adolescence. Whereas past research has focused on social reinforcement mechanisms as the underlying processes, the present longitudinal study analysed the role of external control beliefs as an…

In many intervention and evaluation studies, outcome variables are assessed using a multimethod approach comparing multiple groups over time. In this article, we show how evaluation data obtained from a complex multitrait-multimethod-multioccasion-multigroup design can be analyzed with structural equation models. In particular, we show how the…