Ruth Anne Rehfeldt, PhD, BCBA, is professor of behavior analysis and therapy at Southern Illinois University in Carbondale, IL. She holds doctoral and master’s degrees in psychology from the University of Nevada, Reno; and a bachelor’s degree in psychology from the University of Puget Sound. She is also a board-certified behavior analyst. Ruth Anne is a fellow of the Association for Behavior Analysis International, and previous editor of The Psychological Record. She has published numerous articles in the area of verbal behavior and derived relational responding for individuals with autism spectrum disorder (ASD) and other developmental disabilities.
Yvonne Barnes-Holmes, PhD, is lecturer in psychology in the Department of Psychology at the National University of Ireland, in Maynooth, Ireland.
Steven C. Hayes, PhD, is Nevada Foundation Professor in the department of psychology at the University of Nevada, Reno. He has been president of numerous professional organizations, is author of forty-five books and nearly 650 scientific articles, and is among the most cited living psychologists. He has shown in his research how language and thought leads to human suffering, and is originator and codeveloper of acceptance and commitment therapy (ACT): a powerful therapy method that is useful in a wide variety of areas; relational frame theory (RFT): an empirical program in language and cognition; and process-based therapy (with Stefan G. Hofmann).
