Steven C. Hayes, Ph.D Clinical Psychology, West Virginia University, Morgantown, is a Foundation Professor of Psychology at the University of Nevada. An author of 44 books and nearly 600 scientific articles, he is known for his work on Acceptance and Commitment Therapy, a widely used and researched method of psychological and behavioral intervention, and Relational Frame Theory, a comprehensive empirical research program on human language and cognition. Dr. Hayes has received the Lifetime Achievement Award from the Association for Behavioral and Cognitive Therapy, and is among the most cited psychologists in the word.

• Profile at Steven C. Hayes.com

Michael D. Yapko, Ph.D. (professional psychology, clinical specialization), is internationally recognized for his innovative work in applied clinical hypnosis, developing brief psychotherapies, and the strategic treatment of depression. He has been invited to present his work in more than 30 countries across six continents. He is the author of 15 books, including his most recent, The Discriminating Therapist. He is a recipient of numerous awards for his many contributions to the field, including the Milton H. Erickson Foundation Lifetime Achievement Award.

• Site at Yapko.com

Donald Meichenbaum, Ph.D in Clinical Psychology is currently Research Director of Melissa Institute for Violence Prevention, Miami (melissainstitute.org). He is one of the founders of cognitive behavior therapy. He was voted one of the most influential psychotherapists of the 20th century. Latest books include "Roadmap to Resilience" (www.roadmaptoresilience.com) and "Evolution of Cognitive Behavior Therapy: A Personal and Professional Journey."