Overview: This webinar will describe lessons learned from a series of studies that used social media websites to recruit U.S. veterans into two survey research efforts and a randomized controlled trial addressing heavy alcohol use. As an increasing number of research studies are moving online, the methods described to reach this typically difficult-to-engage group using the Internet alone can be applied to a number of other populations and research designs.    Speaker: Eric R. Pedersen, Ph.D., Associate Professor of Psychiatry and Behavioral Sciences, University of Southern California