This study was designed to enhance self understanding in counselor trainees. Research focused on the effect of Self Understanding Groups on practicum enrollees. Two groups, one with 18 practicum students, and another group enrolled in practicum and also involved in Self Understanding Groups, were formed. The criterion measure for the effect of the Self Understanding Groups was Affective Sensitivity measured by a scale dealing with the feeling level responses of counselors. Evidence indicated that Self Understanding Group participation conjoint with practicum enhances affective sensitivity. Limitations were that the subjects were not assigned to groups randomly and that the sample was small and the groups nonequivalent. Subsequent research should focus on whether participation in Self Understanding Groups enhances counselor effectiveness on the job. (Author/EK)