In this paper, the Adolescent Sexual Abuser Project (ASAP) assessment pack-Dutch Revised Version (ASAP-D) is presented. The ASAP-D is an assessment instrument which measures the personality characteristics that are generally considered relevant in the literature for the development and perpetuation of sexually abusive behaviour in juveniles. After a description of the measures that comprise the instrument, its basic psychometric qualities are presented. In addition, the personality characteristics as measured by the ASAP-D are compared between a group of juvenile sex offenders, a group of juvenile perpetrators of non-sexual violent offences and a representative sample of non-delinquent youth. The results of this comparison are discussed. (Contains 5 tables.)