The research programme of clinical psychology is named “Cognitive aspects of Psychopathology”. The mission of this research programme is to conduct research on (neuro)cognitive factors that contribute to the etiology and maintenance of psychopathology in humans. The dominant approach to achieve this goal is experimental, although also longitudinal and correlational designs are used. In our research programme we focus on two related areas which are organized in sub-programmes: The developmental and neurocognitive perspective. We particularly focus on externalizing psychopathology such as addiction and aggression both in adults and children.