1. Holt was diagnosed as suff ering from schizophrenia. What elements of his behavior seem to fi t the description of this disorder? We’ve discussed some of the many types of psychological disorders to which people are prone, noted the diffi -

culty psychologists and physicians have in clearly diff erentiating normal from abnormal behavior, and looked at some of the approaches mental health professionals have taken to explain and treat psychological disorders. We considered today’s most commonly used classifi cation scheme, categorized in the DSM-IV-TR , and examined some of the more prevalent forms of psychological disorders. To gain a perspective on the topic of psychological disorders, we discussed the surprisingly broad incidence of psychological disorders in U.S. society and the cultural nature of such disorders.