Final answer:
Insight therapy is not commonly mentioned as a useful form of psychotherapy for those with schizophrenia. Cognitive-behavioral therapy, family therapy, and social therapy are recognized treatments, whereas insight therapy is not typically emphasized.
Step-by-step explanation:
The form of psychotherapy not mentioned as being useful for people suffering from schizophrenia is insight therapy. While cognitive-behavioral therapy (CBT), family therapy, and social therapy are recognized as beneficial treatments for schizophrenia, insight therapy is not typically emphasized for this population. CBT in particular is acknowledged for its effectiveness, taking into account cognitive processes and behaviors in treatment. Psychotherapy is also combined with other methods such as antipsychotic medication and sometimes electroconvulsive therapy, depending on the patient's needs.
The answer is option D which is social therapy. While insight therapy, cognitive-behavioral therapy, and family therapy are commonly used and recommended for people suffering from schizophrenia, social therapy is not typically mentioned as a useful form of psychotherapy for this condition.