Investigated within-group differences in psychological distress, social support, and hardiness among adult children of alcoholics (ACAs). Members of ACA support groups (21 men, 58 women) were compared to ACA college students (27 men, 40 women) not involved in such support groups. Support group members reported higher levels of psychological distress, lower levels of hardiness, and less satisfaction with perceived social support than did the college student ACAs. Support group members also reported more negative feelings, attitudes, and behaviors with regard to parental alcoholism than did the college students. For both groups, hardiness and social support were negatively correlated with psychological distress.