Read the passage from "When Good People Do Bad Things,” which is an informational text about research into group behaviors.In a study that recently went online in the journal Neurolmage, the researchers measured brain activity in a part of the brain involved in thinking about oneself. They found that in some people, this activity was reduced when the subjects participated in a competition as part of a group, compared with when they competed as individuals. Those people were more likely to harm their competitors than people who did not exhibit this decreased brain activity.