Have you kept track of the cool kids from your days in school? Are they still cool?
A new study published in the journal Child Development tracked 184 people from ages 13 through 23. Authors Joseph P. Allen, Megan M. Schad, Barbara Oudekerk and Joanna Chango wrote that they found children who try to act older at an early age -- what they call pseudomature behavior -- exhibited a heightened desire to be popular. In the short term, the study finds they are successful.
In the long term, however, the study found that teenagers who try to act cool are more likely to develop into adults who have trouble with close relationships, substance abuse and criminal behavior.
Study author Joseph P. Allen told NPR they call their findings "the high school reunion effect."