Steven C. Hayes, Ph.D., is University of Nevada Foundation Professor of Psychology at the University of Nevada, Reno. An author more than 300 scientific articles and twenty-two books, including Acceptance and Commitment Therapy and Relational Frame Theory-two books that significantly develop the concepts on which Get Out of Your Mind and Into Your Life is based. His research explores the nature of human language and cognition and their application to the understanding and alleviation of human suffering. In 1992, the Institute for Scientific Information reported Hayes among the highest impact psychologist in the world during the years 1986-90 based on the citation impact of his writings. He is past-president of the Association for Advancement of Behavior Therapy, the American Association of Applied and Preventive Psychology, and Division Twenty-Five of the American Psychological Association. He was the first Secretary-Treasurer of the American Psychological Society. He is the recipient of the Don F. Hake Award for Exemplary Contributions to Basic Behavioral Research and Its Applications from Division 25 of the American Psychological Association. In 1999, US Health and Human Services Secretary Donna Shalala appointed him to a four-year term on the National Advisory Council on Drug Abuse.