The co-therapist method of group psychotherapy is advocated. It reproduces the family situation, in which there are two parents, better than therapy by only one person. It provides two styles of verbalization; this often facilitates understanding by group members. It diminishes the intensity of transference in psychotic patients, assists the working through of negative feelings, and provides training for therapists. The relationship between the therapists may be a source of difficulty when they have differences in theoretical orientation or when they are mutually aggressive or too passive, if these characteristics become evident in the therapists' behavior during sessions.