It’s difficult to tell if a rebellious teen’s behavior is something she’ll grow out of. A new study provides evidence that teens with certain behaviors can go on to develop antisocial traits in adulthood. In most cases, adolescent rebellion is outgrown and teens will exhibit concern for others’ feelings, feel remorse for a wrong and adhere to social rules. In a small minority of teens, however, there are psychopathic personality traits that can be measured during adolescence to predict adult psychopathy. Psychopathy is associated with criminal behaviors and antisocial traits and can be a serious problem in adulthood.