This article throws light upon the three main forms of mental disease that lead to abnormal behaviour. The forms are: 1. Psychoneuroses 2. Psychoses 3. Mental Retardation 4. Anti-Social Personalities. Form # 1. Psychoneuroses: Page (1976) holds that Psychoneuroses are relatively mild personality disorders that distress and inconvenience the patient, but do not disrupt his […]