In a society like Denmark, where people with ADHD receive psychosocial treatment and support from the Social Services before they are considered for medical treatment, it is vital that studies of nonpharmacological interventions are conducted. The investigators have to analyze to what extend the interventions can have an effect and on which areas of functioning we can expect improvement. In Denmark, children with most severe behavior problems are treated in special educational settings. In these settings, nonpharmacological treatment is the norm. Considering this, more studies should be conducted in such settings to see if the approaches used are of value.