The Thumbs-Up Effect (IMAGE) University of Delaware Caption Research shows that favorable comments on social networks can have a buoyant effect on potential voters' views of candidates. Credit Jeffrey Chase/University of Delaware Usage Restrictions Must credit the University of Delaware 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.