... , Ph.D., D.Sc., is one of the world's most cited psychologists. He is a professor at the Institute of Psychiatry of the University of London, where he started the discipline of clinical psychology in Great Britain. He is a pioneer in the use of behavior therapy as well as research in personality theory and measurements. The biological theory has to do with his findings ... very little in the area of personality change. In humanistic theory, the motivation for developing one's full learning potential is inherent in each of us. Although there is no real definition for the humanistic theory...

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