The effect of group psychotherapy on 257 inmates suffering primarily from personality and character disorders in a correctional institution is described. Findings based on parole outcome indicated that patients who had treatment did significantly better than controls at one-year follow-up, but the positive effects had disappeared after four years. This suggests the need for crisis intervention with parolees who successfully complete their first year on parole and the development of a program providing continuity of professional service between the institution and the community to sustain the gains made within the institution.Abstract Teaser