William R. Shadish is Professor and Founding Faculty, University of California, Merced. He received his bachelor’s degree in sociology from Santa Clara University in 1972, and his M.S. (1975) and Ph.D. (1978) degrees from Purdue University in clinical psychology, with minor areas in statistics and measurement. He completed a postdoctoral fellowship in methodology and program evaluation at Northwestern University from 1978-1981. His current research interests include experimental and quasi-experimental design, the empirical study of methodological issues, and the methodology and practice of meta-analysis. He is author (with T.D. Cook & D.T. Campbell, 2002) of Experimental and Quasi-Experimental Designs for Generalized Causal Inference, (with T.D. Cook & L.C. Leviton, 1991) of Foundations of Program Evaluation, (with L. Robinson & C. Lu, 1997) of ES: A Computer Program and Manual for Effect Size Calculation, co-editor of five other volumes, and the author of over 175 articles and chapters. He was the founding Secretary-Treasurer of the Society for Research Synthesis Methodology (2005-2010). He is the 2013-14 President of the Society for Research Synthesis Methodology, and was the 1997 President of the American Evaluation Association. He has received the 1994 Paul F. Lazarsfeld Award for Evaluation Theory from the American Evaluation Association, the 2000 Robert Ingle Award for service to the American Evaluation Association, the 1994 and 1996 Outstanding Research Publication Awards from the American Association for Marriage and Family Therapy, the 2002 Donald T. Campbell Award for Innovations in Methodology from the Policy Studies Organization, the 2009 Frederick Mosteller Award for Lifetime Contributions to Systematic Reviews from the Campbell Collaboration, and the 2011 Ingram Olkin Award for Lifetime Contributions to Systematic Reviews from the Society for Search Synthesis Methodology. He is a Fellow of the American Psychological Association, Associate Editor of American Psychologist, past Associate Editor of Multivariate Behavioral Research, and past editor of New Directions for Evaluation.