Nowadays a theoretical psychotherapeutical thinking develops from the great amount of psychotherapeutical approaches and systems, from the eclectic practice and uses particularly the research of the effective factors of the therapy. They can be characterized as differentiate, synthetic, integrative and as exceeding other approaches. The development in question goes on with attempts of creating a general model of psychotherapy that could be a basis for models of special psychotherapies, research and practice. The aim of such a model is to describe all that is present as important factor for inducing a desirable change of a human in all psychotherapeutical approaches and that was succesful in practice. Among general models we can mention the generic model of D. E. Orlinski and K. I. Howard, Grawe’s cube (the author is K. Grawe) and the equation of psychotherapy.

        Key words: differentiation and integration in psychotherapy, eclectic approach, effective factors of therapy, equation of psychotherapy, general model of psychotherapy, quality of life, research in psychotherapy.