The behavioural and emotional development of children with ADHD visiting day treatment centres after school hours is described and the childrearing factors that govern positive development explored. Test scores on the "Child behaviour checklist" (CBCL) and "ADHD behavioural symptoms rating scale" were obtained over a period of nine months, in a sample of 86 children with ADHD, and related to the activities of the professional care-givers. Behavioural control mixed with affectionate and emotional support reduced the ADHD symptoms at the follow-up. According to the CBCL measures, the overall emotional and behavioural problems of the children did not improve. This suggests that prolongation of the day treatment is still required after nine months. (Contains 2 tables.)