Steven C. Hayes

Steven C. Hayes is an American clinical psychologist and Nevada Foundation Professor at the University of Nevada, Reno Department of Psychology, where he is a faculty member in their Ph.D. program in behavior analysis. He is known for developing relational frame theory, an account of human higher cognition, and as the co-developer of acceptance and commitment therapy (ACT), a popular evidence-based form of psychotherapy that uses mindfulness, acceptance, and values-based methods, and is the co-developer of process-based therapy, a new approach to evidence-based therapies more generally. He also coined the term clinical behavior analysis.