*Hayes, Steven C.: *-Steven C. Hayes, PhD , is Foundation Professor Emeritus at the University of Nevada, Reno; and president of the Institute for Better Health. Author of forty-eight books and more than 700 scientific articles, he has been president of numerous professional organizations and is amo...

*Hayes, Steven C.: *-Steven C. Hayes, PhD , is Foundation Professor Emeritus at the University of Nevada, Reno; and president of the Institute for Better Health. Author of forty-eight books and more than 700 scientific articles, he has been president of numerous professional organizations and is among the most cited living psychologists. He has shown in his research on relational frame theory (RFT) how and why language and symbolic thought leads both to human achievement and to human suffering, and has guided the extension of RFT to ACT.