As every adolescent knows, trying to “be cool” is the utmost priority. Whether you want to be a rebel without a cause or a mean girl, certain things never change. However, new research out of the University of Virginia claims that the effect of being cool is short-lived. In fact, “cool” teens were more likely than their peers to face certain issues as early adults. Following teens from age 13 to age 23, researchers collected information from the teenagers themselves, as well as their parents and teachers. Many of the behaviors that led individuals to think others were cool were socially mature behaviors. Teens who were involved in dating relationships, those who engaged in delinquent activity, and those who hung out with physically attractive people were considered popular by their peers at age 13. However, by age 22, those same individuals were rated by their peers as being less competent at managing social relationships. Those who were cool at 13 were also more likely to have addiction issues and engage in criminal activity as they aged. According to researcher Joseph P. Allen, PhD , the behaviors that made teens appear cool in early adolescence had to become more and more extreme in order to be seen as cool as they aged, leading to more serious criminal behavior and alcohol and drug abuse. By the time cool teens reached adulthood, their more extreme behaviors were no longer seen as cool, but instead led others to think they were less competent and, thus, less cool. The full study appears online in Child Development .