1. The development of treatment interventions for non-fatal deliberate self-harm (DSH) among young people has received little attention in scientific literature and in mental health care. This is surprising, considering the relatively high rates of hospital-referred DSH among adolescents reported in epidemiological studies (Arensman et al., 1995; Hawton et al., 1997; Hawton et al., 1998; Schmidtke et al., 1996). On the basis of a four-year monitoring study (1989-1992) in the area of Leiden, the average rate of DSH among females aged 15-24 was 179 per 100,000 and for males in this age group the average rate was 91 per 100,000 (Arensman et al., 1995). General population surveys among adolescents show a self-reported life-time prevalence of 2 to 5 percent (Kienhorst et al., 1990; De Wilde et al., 2000). Reports from other European countries indicate an increase of DSH in adolescents and young adults (15-30 years), in particular in young males (Hawton et al., 1997; Schmidtke et al., 1996).