Increased Sample Size in 2015 (IMAGE) U.S. National Science Foundation Caption Increased sample size in 2015 Survey of Doctorate Recipients enables first time reporting on fine fields of study. Credit Rob Margetta 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.