8. In the Bond, Carlin, Thomas, Rubin and Patton (2001) study on bullying in schools and depression, why could attrition have influenced their results?
9. Why would the reasons for attrition rates be different for children and for adults?
10. What steps did Wutzke, Congirave, Kogler, Saunders, and Hall (2000) take in their study of heavy alcohol users that resulted in a relatively low attrition rate?
11. Explain why case studies are useful for studying people with characteristics that are manifested idiosyncratically and that others don’t share.