Children with a disruptive behaviour disorder (DBD) develop an inimical worldview over the years; their aggressive behaviour, events experienced as negative and their poor emotion regulation, may...Show moreChildren with a disruptive behaviour disorder (DBD) develop an inimical worldview over the years; their aggressive behaviour, events experienced as negative and their poor emotion regulation, may play a role in this. This study focused on the influence of emotion regulation and events that are experienced as negative on type of aggression (reactive, proactive or reactive and proactive in combination) in boys aged between eight and twelve year with and without DBD. 43 Boys with and 41 boys without DBD participated in this study. The data were collected with the ‘Instrument voor Reactieve en Proactieve Agressie’, the ‘Vragenlijst Meegemaakte Gebeurtenissen’ and the ‘Ultimatum Game’. There were four research questions formulated out of the main question. The research questions were examined with t-tests, a oneway analysis of variance and three times a Spearman’s rho. Boys with DBD are more aggressive, have gone through more events experienced as negative and have an equal to poorer emotion regulation than boys without DBD. There is no relationship found between emotion regulation, events that are experienced as negative and aggression type in boys with and without DBD.Show less