Factors involved in the outcome of psychotherapy were studied by asking 5 individual therapists to judge their own effectiveness under various therapeutic conditions. Of 9 variables, only 2 were statistically related to positive outcome based on therapists' subjective opinion: the number of interviews, and approaches in which individual psychotherapy was combined with other approaches such as chemotherapy and family therapy. Although subjective, the data suggest that therapists see more improvement in clients seen in six or more interviews than those seen in five or less.
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