The study investigated the psychological health of participants in a Methodist Church laboratory training design, and sought evidence of change toward more inner direction, openness, or intraception (sensitivity to the feelings and attitudes of others). Open-mindedness was measured by Rokeach's Dogmatism Scale, Form E; inner direction, by the Inner Directed Scale of the POI (Personal Orientation Inventory); and intraception, by the Intraception Scale from the Edwards Personal Preference Schedule. Subjects consisted of prospective laboratory leaders who had had three laboratory experiences, trainee leaders with one experience, and a comparison group of leadership class participants. In each group, half were pretested and posttested and half were posttested only. These were among the conclusions: (1) all three groups gained significantly on inner directedness, but none changed significantly on open-mindedness; (2) on the posttest, prospective laboratory leaders were more inner directed than other groups, and men more so than women; (3) there were no significant changes in intraceptiveness within or between groups; (4) the training design seemed to be attracting relatively open-minded, inner directed persons into positions of leadership as trainers. (author/ly)