The development of a therapy group necessitates interpersonal interaction characterized by the disclosure of personal problems and emotions. Thus, traditional group therapists consider that the use of impersonal topics indicates resistance. The author quotes Coons, who asserts that interpersonal interaction is fostered by a warm, accepting social environment which is the essential factor in the therapeutic process. The content is important only as a means of maintaining patient interest. Yalom holds that conditions for change in group therapy are interpersonal learning, group cohesiveness, social techniques, altruism, corrective recapitulation of a family group, imitative behavior, and instillation of hope. Others say that the capacity for group therapy depends upon a sense of belonging, control, rewards and punishment, definition of reality for the patient, the induction and realizing of feeling, and the distribution of power and influence