The Oxford Handbook of Acceptance and Commitment Therapy

Michael P. Twohig, Ph.D., is a licensed psychologist in the state of Utah and a Professor of Psychology at Utah State University, where he co-runs the ACT Research Group (with Dr. Levin). He received his B.A. and M.S. from the University of Wisconsin-Milwaukee, his Ph.D. from the University of Nevada, Reno, and completed his clinical internship at the University of British Columbia Hospital. He is past-President of the Association of Contextual Behavioral Science, the organization most associated with Acceptance and Commitment Therapy (ACT). His research focuses on the use of ACT across a variety of clinical presentations with an emphasis on obsessive compulsive and related disorders. He has published over 200 scholarly works including 5 books, with the most recent being Innovations in ACT (with Levin and Krafft) and ACT in Steps (with Levin and Ong). His research has been funded through multiple sources including the National Institute of Mental Health. Michael E. Levin, Ph.D., is a Professor in the Department of Psychology at Utah State University and co-directs the ACT Research Group with Dr. Twohig. He received his Ph.D. in Clinical Psychology from the University of Nevada, Reno under the mentorship of Dr. Steven C. Hayes and completed his predoctoral internship at the Brown University Clinical Psychology Training Consortium. Dr. Levin's research focuses on internet-based ACT interventions for a range of mental health and chronic health conditions. He has published over 100 peer-reviewed articles, primarily on ACT and self-guided interventions delivered through websites, apps, and books. Dr. Levin is also a Fellow of the Association for Contextual Behavioral Science and Editor-in-Chief for the Journal of Contextual Behavioral Science. Julie M. Petersen, M.S., is a doctoral student in the combined clinical/counseling psychology program at Utah State University. She received her B.S. in psychology from Haverford College in 2016. Before coming to USU, she worked as a research assistant at the University of Pennsylvania's Center for the Treatment and Study of Anxiety. Her research interests are centralized around the treatment of obsessive-compulsive and anxiety disorders, particularly for kids and teens. She has published more than 20 articles and book chapters related to ACT, and has collaborated with Levin and Twohig on numerous research studies and projects related to ACT.