Barry L. Duncan, PsyD, is a therapist, trainer, and researcher with more than 17,000 hours of clinical experience. He is director of the Heart and Soul of Change Project, a practice-driven training and research initiative that focuses on what works in therapy and, more importantly, how to deliver it on the front lines via client-based outcome feedback. Dr. Duncan received the Wright State University School of Professional Psychology's first annual Outstanding Alumnus Award for his contributions to the field, and the Psychotherapy Networker 20th Anniversary All Time Top Ten Award for the article "Exposing the Mythmakers." He has more than 100 publications, including 15 books, including Brief Intervention for School Problems; What's Right With You; The Heroic Client; and the volume, On Becoming A Better Therapist. 
 
Scott D. Miller, PhD, is a cofounder of the Center for Clinical Excellence, an international consortium of clinicians, researchers, and educators dedicated to promoting excellence in behavior health. Dr. Miller conducts workshops and training in the United States and abroad, helping hundreds of agencies and organizations, both public and private, to achieve superior results. He is the author of numerous articles and a coauthor of many books including Escape From Babel: Toward a Unifying Language for Psychotherapy Practice; Psychotherapy With Impossible Cases: Efficient Treatment of Therapy Veterans ; The Heart and Soul of Change: What Works in Therapy; The Heroic Client: A Revolutionary Way to Improve Effectiveness Through Client-Directed, Outcome-Informed Therapy; and Achieving Clinical Excellence: Lessons From the Field's Most Effective Practitioners.

Bruce E. Wampold, PhD, ABPP, who was trained in mathematics (BA from the University of Washington) before earning his doctorate in counseling psychology (PhD from the University of California, Santa Barbara) is professor and chair of the Department of Counseling Psychology at the University of Wisconsin–Madison. Currently, his work involves understanding counseling and psychotherapy from empirical, historical, methodological, and anthropological perspectives. He is the author of more than 100 books, chapters, and articles related to counseling, psychotherapy, statistics, and research methods and has given lectures on these subjects nationally and internationally.
 
Mark A. Hubble, PhD, a national consultant, has coauthored and coedited several books, including The Handbook of Solution-Focused Brief Therapy, Escape From Babel: Toward a Unifying Language for Psychotherapy Practice, and Staying on Top and Keeping the Sand Out of Your Pants: A Surfer's Guide to the Good Life, and was the lead editor for the award-winning first edition of The Heart and Soul of Change: What Works in Therapy. Dr. Hubble is a graduate of the postdoctoral fellowship in clinical psychology at Menninger and formerly served on the editorial review board for the Journal of Systemic Therapies.