Daniel T. O'Brien, Binghamton University (IMAGE) Binghamton University Caption According to a recent study by Daniel T. O'Brien, Binghamton University researcher, peer aggression and victimization during adolescence is a form of competition for reproductive opportunities. Credit Jonathan Cohen Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.