Steven Hayes

Steven Hayes
Professor in Behavior Analysis, Department of Psychology, University of Nevada

Steven C. Hayes is Nevada Foundation Professor in the Behavior Analysis program at the Department of Psychology at the University of Nevada. An author of 44 books and nearly 600 scientific articles, he has been at the forefront of developing Contextual Behavioral Science (CBS), a major offshoot or branch of behavior analysis. Grounded in the orienting assumptions of functional contextualism, CBS addresses human complexity using behavioral principles as augmented by relational framing and evolution science. CBS approaches have been shown to have very broad applicability across diverse areas of human difficult and human prosperity, and its international society exceeds 8,000 members, with 27 international chapters in 18 languages. A recipient of the Impact of Science on Application award from the Society for the Advancement of Behavior Analysis, and the Lifetime Achievement Award from the Association for Behavioral and Cognitive Therapy, Google Scholar data ranks him as among the most cited scholars in the world (


Acceptance and Commitment Training is Part of Applied Behavior Analysis


Acceptance and Commitment Training (ACT) is a training-based version of a psychotherapeutic approach that is based on the psychological flexibility model of human behavioral health, which has been constructed using behavioral principles as augmented by Relational Frame Theory (RFT) and multi-level, multi-dimensional evolution science (EvoS). ACT has been evaluated in hundreds of open trials and time-series analyses, and nearly 200 randomized controlled trials and its underlying applied and basic theory has been examined in well over 1,000 studies. In this talk I will argue that the use of ACT methods appears to be within the scope of practice of certified behavior analysts provided behavior analysis itself includes principles drawn from RFT and EvoS. Data on the use of ACT in traditional areas of behavior analytic work will be shown. If certified behavior analysts move in this direction, it will significantly alter behavior analytic practice and will likely move the field more generally in a contextual behavioral science direction.