In the present study, the short 18-item version of the Youth Psychopathic Traits Inventory (YPI-S) was used to examine whether adolescent males (n = 376, age 12–18) in a Dutch forensic setting could be differentiated based on psychopathic-like trait-profiles into a relatively normal group, an impulsive non-psychopathic-like group and a psychopathic-like group as proposed by Andershed, Kerr, Stattin &Levander (2002a) and whether these groupdifferences predicted type and quantity of institutional infractions. The YPI-S has not been used previously in a Dutch forensic setting, but has a high convergence with the original 50item version and is therefore a time- and cost-effective method to measure. So far, the abovementioned psychopathic-like profiles have not been examined in a Dutch forensic setting.
The proposed three groups could be differentiated as expected. The psychopathic-like group showed higher scores of infractions than the other two groups. Furthermore the psychopathic-like subgroup, as expected, did not show a difference in physical infractions directed at peers or staff. These findings justify the conclusion that YPI-S is a useful measure for group differentiation and prediction of institutional infractions among Dutch forensic adolescent males.