To what extent does psychosocial development have an effect on problem behaviour development? And does the effect of this development of psychosocial maturity differ for boys and girls? This thesis... Show moreTo what extent does psychosocial development have an effect on problem behaviour development? And does the effect of this development of psychosocial maturity differ for boys and girls? This thesis focuses on answering these questions. The research that is presented aims to identify relations in levels as well as paths of psychosocial development on problem behaviour. The study uses data from the School project, a longitudinal research project on adolescents that examined (problem) behaviour and relevant relating factors. This research provides insight into psychosocial development, as well as the effect of parental relations and peer relations on problem behaviour prevalence. Show less