8. What are the symptoms of obsessive-compulsive disorder (OCD)? What evidence of a brain abnormality has been found to explain some cases of OCD?
9. Describe the vulnerability-stress explanation of depression. Provide examples of upsetting events that could trigger a depression.
10. Describe the research findings that emphasize the role of genetics and brain chemistry in the development of depression.
11. Discuss the stressful circumstances of people’s lives that theorists have linked to the development of depression. Include the risk factors that increase the chances that a person will develop major depression.