In recent years, the studies of the effects of drugs on the behavior of animals have been playing an increasingly important role. Animal studies have… - Thaddeus E. Weckowicz

Ludwig von Bertalanffy, a distinguished biologist, occupies an important position in the intellectual history of the twentieth century. His contributions went beyond biology, and extended to psychology, psychiatry, sociology, cybernetics, history and philosophy. Some of his admirers even believe that von Bertalanffy's general systems theory could provide a conceptual framework for all these disciplines.

The previous chapters presented models of mental illness that were based on the biological, behavior, and the social sciences. Although in the past two centuries the scientific outlook has had a great appeal, its application to the human mind and society has encountered widespread criticism. The critics often argue that the legal and political system of out society is based on the assumption of individual freedom, moral responsibility, and mutual obligations of its citizens. They argue further that subjective meanings and value judgements are the essential features of human experience.

The behaviourist motto is "cure the symptoms and you have eliminated the neurosis." Consequently, the behaviour therapist's approach is straightforward. He deals with definite complaints of patients such as fears of certain situations, tics, or obsessional thoughts, which are considered by him to be bad habits. His remedy for them is to use definite and explicit retraining procedures.