Abstract
Fifty offenders incarcerated in a minimum security provincial institution participated in a variety of group programs with community volunteers. Inmates were randomly assigned to one of four treatment regimes or to a control group condition. The experiment subjects participated in community group discussions with either trained or untrained volunteers, and a concurrent activity, either a self‐control program or a recreational group. A test battery was administered in a pre/post fashion and follow‐up recidivism was monitored. Two‐by‐two factorial analyses of the treatment programs revealed a significant interaction between activities. Inmates who had participated in discussion groups with trained volunteers and in a self‐control program showed the most improvement on the test battery variables. This treatment effect generalized to inmates’institutional behavior, as measured by staff ratings and disciplinary offences. However, program participation was not related to postrelease success. Nonetheless, correlations between attitude change during the period of incarceration and recidivism were found. Among offenders who increased in their identification with the delinquent subculture, those who also increased in self‐esteem experienced less follow‐up success than those who decreased in self‐esteem. These results are discussed in terms of the complex relation between client characteristics, treatment, and other program services that must be considered in evaluating correctional programs.