Since Kagan (1963) developed interpersonal process recall more than 20 years ago, there has been continuing interest in the thought processes of practitioners. A case study approach was used to analyze the retrospections of a graduate student counselor and the cognitions of an experienced supervising psychologist about a counseling session with a 10-year-old disturbed boy. When coded independently on six dimensions, the supervisor's cognitions did not differ significantly from the counselor's retrospections. Both stressed present time, in-session and internal events, and both were professional rather than personal in orientation, and predominantly critical. These findings are consistent with the fact that the counselor and supervisor had had a close working relationship for several years. In contrast, when the supervisor listened to a tape of another counseling student, responses differed qualitatively and quantitatively. The findings suggest that interpersonal process recall can be applied objectively to the supervisory process. (JAC)