Aggressive behaviour is an important problem in mental health care. Aggressive behaviour does not only affect staff and other patients, but also has a negative impact on the patient self. Studies have shown that aggressive patients have a longer stay on psychiatric wards compared to non-aggressive patients. In psychiatric wards, several interventions are used to manage aggressive behaviour. In the Netherlands, seclusion has for decades been a highly common intervention to manage (imminent) aggression. During recent years, however, the use of seclusion has been heavily criticized.