Steven C. Hayes, PhD

Steven C. Hayes, PhD, is a Nevada Foundation Professor in the Department of Psychology at the University of Nevada. An author of 45 books and over 625 scientific articles, his work focuses on understanding the nature of human language and cognition, and how it can help alleviate human suffering. He is the developer of Relational Frame Theory and has guided its extension to Acceptance and Commitment Therapy (ACT). Learn more at