Pattern (IMAGE) Rissho University Caption A typical pattern of time evolution of norms' frequencies and the cooperation rate generated by 'individualism': Stern-Judging gets a majority after defective norms have disappeared and cooperation has been realized. Credit Hitoshi Yamamoto 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.