Ed Diener, University of Illinois at Urbana-Champaign (image) University of Illinois at Urbana-Champaign Share Print E-Mail Caption University of Illinois professor emeritus of psychology Ed Diener, a senior scientist with the Gallup Organization, led a global study of happiness. Credit Photo by L. Brian Stauffer, U. of I. News Bureau Usage Restrictions Photo may be used only with stories about the research described in the news release. Please credit: Photo by L. Brian Stauffer, U. of I. News Bureau. Share Print E-Mail 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.