Robert J. McMahon, Ph.D., is a Professor of Psychology at Simon Fraser University, and the LEEF B.C. Leadership Chair in Proactive Approaches to Reducing Risk for Violence among Children and Youth. To carry out the work of the Chair, Dr. McMahon directs a new Institute for the Reduction of Youth Violence. He is also a senior scientist at the Child & Family Research Institute (CFRI). Dr. McMahon’s primary research and clinical interests concern the assessment, treatment, and prevention of conduct problems and other problem behavior in children and youth, especially in the context of the family.