Marco Yzer (Ph.D., University of Groningen, 1999) is associate professor of communication at the University of Minnesota, where he also has an adjunct appointment with the School of Public Health. His research focuses on motivational processes that explain how mass-mediated and interpersonal communication may contribute to or inhibit health behavior. His work includes studies funded by the National Institute of Drug Abuse and the National Cancer Institute, and has appeared in communication, psychology, and public health journals.