Steven C. Hayes, PhD, is foundation professor and director of clinical training in the department of psychology at the University of Nevada. An author of thirty-eight books and over 540 scientific articles, his career has focused on an analysis of the nature of human language and cognition and the application of this to the understanding and alleviation of human suffering and the promotion of human prosperity. Among other associations, Hayes has been president of the Association for Behavioral and Cognitive Therapies (ABCT), and the Association for Contextual Behavioral Science. His work has been recognized by several awards, including the Impact of Science on Application Award from the Society for the Advancement of Behavior Analysis, and the Lifetime Achievement Award from the ABCT.
Stefan G. Hofmann, PhD, is a professor in Boston University's department of psychological and brain sciences clinical program, where he directs the social anxiety program at the Center for Anxiety and Related Disorders. His research focuses on the mechanism of treatment change, translating discoveries from neuroscience into clinical applications, emotions, and cultural expressions of psychopathology. He is president of the Association for Behavioral and Cognitive Therapies, and the International Association for Cognitive Psychotherapy. He is also editor in chief of Cognitive Therapy and Research, and is associate editor of the Journal of Consulting and Clinical Psychology. He is author of An Introduction to Modern CBT.