Professor, Department of Psychology, University of Rhode Island, where he is also the Director of the Behavioral Science PhD program, Director of Research at the Cancer Prevention Research Center, and a member of the University’s Institutional Review Board. His areas of interest include quantitative methods, the transtheoretical model of health behavior change, multiple health behavior change, and computer-tailored intervention development. He has twice been listed as one of the highest impact authors in psychology, in 1996 and 2006.