Albert Ellis, PhD Related seminars and products: 67

Albert Ellis, PhD, was an American psychologist who in 1955 developed Rational Emotive Behavior Therapy (REBT). He held M.A. and Ph.D. degrees in clinical psychology from Columbia University and American Board of Professional Psychology (ABPP). He also founded and was the President of the New York City-based Albert Ellis Institute for decades.

He is generally considered to be one of the originators of the cognitive revolutionary paradigm shift in psychotherapy and one of the founders of cognitive-behavioral therapies.^[2]

Based on a 1982 professional survey of US and Canadian psychologists, he was considered as the second most influential psychotherapist in history (Carl Rogers ranked first in the survey; Sigmund Freud was ranked third).^[3][4] Psychology Today noted, “No individual—not even Freud himself—has had a greater impact on modern psychotherapy.”^[5] 

• Albert Ellis Profile at Albert Ellis.com

Erving Polster, PhD Related seminars and products: 132

Erving Polster, Ph.D in clinical psychology, is the Director of The Gestalt Institute of San Diego, and the author of several important books, including Gestalt Therapy Integrated, Every Person’s Life is Worth a Novel, and From the Radical Center: The Heart of Gestalt Therapy, as well as dozens of articles and chapters. Erving has authored 6 books. In his current writings, he offers perspectives and designs for a communal application of psychotherapy principles. He also describes and celebrates a powerful contemporary momentum for people-at-large to join together in the search for personal and social enlightenment.

Jeffrey Zeig, PhD Related seminars and products: 303

Jeffrey K. Zeig, PhD, is the Founder and Director of the Milton H. Erickson Foundation and is president of Zeig, Tucker & Theisen, Inc., publishers in the behavioral sciences. He has edited, co-edited, authored or coauthored more than 20 books on psychotherapy that appear in twelve foreign languages. Dr. Zeig is a psychologist and marriage and family therapist in private practice in Phoenix, Arizona. 

• Site at Jeffrey Zeig.com