Jason Moser, Michigan State University (IMAGE) Michigan State University Caption A study led by Michigan State University psychologist Jason Moser is the first to provide biological evidence suggesting there are positive and negative thinkers. Credit Michigan State University 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.