In the early 1960s, an infamous murder occurred in the Queens borough of New York City. A young woman named Kitty Genovese was stabbed to death while in the courtyard of her apartment complex. The attack lasted 45 minutes, and at least 38 observers watched the murder from the windows of their apartment above. However, not a single one of them attempted to help Genovese, not even by telephoning the police. How might a sociologist explain the behavior of the bystanders? A personality psychologist? A social psychologist?