Richard Ryan, University of Rochester (image) University of Rochester Caption "When people feel they have no control over the outcome of a game, that leads to aggression," explains coauthor Richard Ryan, a motivational psychologist at the University of Rochester. "We saw that in our experiments. If you press someone's competencies, they'll become more aggressive, and our effects held up whether the games were violent or not." Credit University of Rochester Usage Restrictions For use with coverage of study. 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.