Relationship between locus of control, structure of therapy, and outcome

Reports 2 studies that replicated a study by P. R. Kilmann and R. J. Howell (1974) to examine the relationship between locus of control and the structure of group therapy. Data from undergraduates who were assigned to either a 16-hr marathon or group therapy sessions tentatively suggest that external Ss may achieve the most significant therapeutic benefits from a structured therapist intervention within a spaced time format, while internal Ss may require a therapist model of minimal control and structure.