EEfRT (IMAGE) Vanderbilt University Caption Individuals suffering from anhedonia, a key symptom of depression, are less likely to pursue rewards if effort is required to obtain the reward. Credit Michael Treadway, Vanderbilt 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.