The search for common factors in psychotherapy. Two theoretical models, with different empirical implications
The difficulties of demonstrating that any specific form of psychotherapy is more effective than any other has led to the formulation of the so-called Dodo Bird Verdict (that all forms of therapy are equally effective) and to the suggestion that what really matters for therapeutic efficiency are factors that are common to different forms of therapy. The term “common factors”, however, is seldom de
