Most psychotherapists and researchers agree that a good relationship essentially contributes to therapeutic change. The psychoanalytic concepts transference and countertransference which describe fundamental aspects of the psychotherapeutic relationship have now become integrated into behavior therapy. These concepts, however, are used differently in psychoanalysis as well as in behavior therapy. This makes the communication between psychotherapists coming from different orientations difficult. Therefore, a research approach which describes the important verbal and nonverbal elements of a helpful therapeutic interaction independently from therapeutic orientation could help to evaluate their effectiveness in different psychotherapeutic methods. In this way a culture of integration into psychotherapy could be encouraged.