Score Table A or B. What makes a behavior abnormal? What are the major psychological disorders and how do mental health professionals diagnose them? What causes abnormal behavior and what treatment strategies have proven to be effective? Investigate a wide array of psychological disorders and related theoretical concepts. Review diagnostic criteria, possible causes, treatment modalities, and the ways in which our perception of what constitutes acceptable behavior has changed over time. Examine the impact psychological disorders have on society, and analyze current controversies associated with disorders and the broader field in general.