David MacKinnon is a Foundation Professor in the Department of Psychology at Arizona State University.  He received the BA from Harvard University in 1979 and the Ph.D. in measurement and psychometrics from UCLA in 1986.  He was an Assistant Professor of Research at the University of Southern California’s Institute for Prevention Research from 1986 to 1990.  He has been at Arizona State University since 1990 and is affiliated with the Prevention Intervention Research Center and the Research in Prevention Laboratory.  Dr. MacKinnon teaches graduate analysis of variance, mediation analysis, and statistical methods in prevention research as well as undergraduate psychological statistics classes. He received the 2007 Outstanding Graduate Mentor Award at Arizona State University.  In 2011 he received the Nan Tobler Award from the Society for Prevention Research for his 2008 book on statistical mediation analysis. He has served on federal review committees including a 5-year term on the Epidemiology and Prevention review committee. He is on the editorial board of the journals Prevention Science and Psychological Methods.  He is also a member of the Prevention Research Methodology Group.  Dr. MacKinnon has been principal investigator on several National Institute on Alcoholism and Alcohol Abuse and National Institute on Drug Abuse grants.  His primary interest is in the area of statistical methods to assess how prevention and treatment programs achieve their effects.