The steady trend towards the integration of psychotherapy over the past two decades, mainly in the United States, were overviewed, with emphasis on the roles played by behavior therapy. 1) . Several factors influencing the integration, such as the proliferation of psychotherapies, the inadequacies of any one specific therapy, and external socioeconomic pressure, were discussed. 2) . Behavioral-dynamic integration, the most popular combination, was historically reviewed. In the 1950s, only a few of writers addressed this topic, with French's address in 1932 being the earliest attempt. A rapidly growing body of literature appeared with each subsequent decade, more and more from the side of cognitive behavior therapy. Recurrent themes include: the complementarity of divergent approaches, the interrelation of cognition, behavior and affect, empirically based therapy, the need for a common language, and common therapeutic principles. 3) . Current arguments between behavioral and dynamic approaches, which must be resolved for further developing the integration, concerning topics such as different world views, the roles of the unconscious, the importance of transference, and the goals of therapy were discussed. 4) . Integration with other orientations such as humanistic and Rogerian theories were mentioned. 5) . Eclecticism and integration were differentiated, and various types of integration were described. 6) . The problem of training as a future task was discussed.
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