Melvin M. Mark, PhD, is Professor and Head of Psychology at The Pennsylvania State University in University Park, Pennsylvania. He has served as President of the American Evaluation Association and as Editor of the American Journal of Evaluation (for which he is now Editor Emeritus). Dr. Mark’s interests include the theory, methodology, and practice of program and policy evaluation, as well as the application of social psychology.

Stewart I. Donaldson, PhD, is Distinguished University Professor of and Executive Director of the Claremont Evaluation Center and The Evaluator’s Institute at Claremont Graduate University in Claremont, California. He currently serves on the board of the American Evaluation Association. Dr. Donaldson has been honored with Early Career Achievement Awards from the Western Psychological Association and the American Evaluation Association.

Bernadette Campbell, PhD, is Assistant Professor of Psychology at Carleton University in Ottawa, Ontario, Canada. Her research applies social psychological theories of negotiation, persuasion, and attitude change to achieve a better practical and theoretical understanding of evaluation activities and concepts such as stakeholder dialogue and evaluation influence.