There?s only one thing harder than living in a home with an adolescent ? and that?s being an adolescent. The moodiness, the volatility, the wholesale lack of impulse control, all would be close to clinical conditions if they occurred at another point in life. In adolescence, they?re just part of the behavioral portfolio.It?s no surprise that in a home that includes such a temperamental free radical there are a lot of fights. To hear the adolescents themselves tell it, it?s all their parents? and siblings? fault; they get along just fine with their friends, thank you very much. But a new study by researchers from Seoul National University, UCLA?s Semel Institute for Neuroscience and Human Behavior, and the University of Wisconsin at Madison suggests that?s not so.