Chapter 18 the treatment of mental disorders. Mental disorders and psychotherapy: 4 basic approaches to treatment of mental disorders, insight therapies, behaviour therapy, cognitive-behaviour therapies, treatment of groups. Insight therapies: assume that people are essentially normal but learn maladaptive thought patterns and emotions, which are revealed in maladaptive behaviours, once patient understands causes of problems, the behaviour will cease. Evaluation of insight therapies: the processes proposed by psychoanalytic theory have not been subjected to a great deal of empirical scrutiny until relatively recently. For classical psychoanalysis only a small proportion of people with mental disorders qualify for this method of treatment: among the drawbacks of insight therapies is the relatively narrow range of people that may benefit by undergoing such therapy. In general, the people who seem most likely to benefit from insight psychotherapy are those who are intelligent and able to articulate their problems. Insight therapies generally are not effective with persons with serious mental disorders such as schizophrenia.