Paul Karoly is Professor of Psychology at Arizona State University. He is a clinical-health psychologist with over four decades of experience as a teacher and researcher. He has published extensively on and developed models of the goal-centered processes of self-regulation and self-control as applied to such topics as chronic pain, psychopathology, psychological assessment, and therapeutic change. He is editor or co-editor of ten other volumes, and
serves as a reviewer for multiple pain journals. He is a fellow of Division 1 (General Psychology) and Division 38 (Health Psychology) of the American Psychological Association.
Geert Crombez is Professor of Health Psychology at Ghent University, where he founded the health psychology research group. He has developed various theoretical models on pain, disability and suffering that have substantial impact on research and practice. He uses and develops innovative research methods to validate these models. Foundational to his research is a
motivational perspective that is built around the powers of goals and self-regulation