Used a quasi-experimental design to compare the performance of 12 adult male offenders attending the interactional life skills (ILS) program with that of 12 adult male offenders in a comparison group receiving conventional inpatient group therapy. Performance was compared on 5 outcomes: desire for participation in other primary groups, need for social inclusion, ability to take on group roles, positive valuation of those group roles, and feelings about group participation. The ILS group took on significantly more roles than the comparison group, particularly the pleaser, director, and risk-taker roles. Furthermore, the ILS group values the roles they occupied to a greater extent than did the comparison group and more ILS Ss felt excited about participating. (PsycINFO Database Record (c) 2019 APA, all rights reserved)