Calvin M. Langton, Ph.D., C. Psych., is an Associate Professor in the Department of Psychology, University of Windsor, Ontario, Canada. Dr. Langton is a clinical and forensic psychologist registered in Ontario, Canada, and also a chartered psychologist in the UK.

James R. Worling, Ph.D., C. Psych., is a clinical and forensic psychologist in full-time private practice in Toronto, Canada, who has worked extensively since 1988 with adolescents who have offended sexually.