David R. Evans is professor emeritus at the University of Western Ontario, where he was a member of the Clinical Psychology Program for 30 years. He has been a consultant to numerous agencies, including hospitals, adolescent facilities, addictions facilities, and police services. He holds a Ph.D. in applied psychology from the University of Toronto. He has twice been a visiting scholar at Wolfson College, Cambridge. He is a past president of the Canadian Psychological Association and the Ontario Psychological Association. He also has been a member of the Council of Representatives of the American Psychological Association and a representative to the International Union of Psychological Science. He is the author of numerous books, chapters, journal articles, tests and papers.