Dennis C. Turk, PhD, is the John and Emma Bonica Professor of Anesthesiology and Pain Research at the University of Washington. He was the recipient of the American Psychological Association, Division of Health Psychology, Outstanding Scientific Contribution Award and the American Association of Pain Management's Janet Travell Award. He has over 300 publications and has written and edited 13 volumes. Dr. Turk is currently editor-in-chief of [i]The Clinical Journal of Pain[/i]. Ronald Melzack, PhD, studied psychology at McGill University. After receiving his PhD in 1954, he spent 5 years ca...