This is a nested clinical study in the NIH funded research project RC2AG036592, "Developing Interactive Technology to Improve Research and Health Behavior". The purpose of the research project is to create a web-based infrastructure to accelerate research in behavioral economics to improve health. Failure to adhere to medical treatments is a major cause of poor outcomes that increase health care spending. Changing unhealthful behaviors is difficult. One barrier to behavioral change is the need to provide patients with immediate, timely information about their behavior. Individual clinicians cannot maintain the frequent contact that is required, but technology and automated feedback mechanisms can keep these issues salient for patients. Internet technology is increasingly seen as an appealing tool to overcome this barrier and promote patient self-management. Recent evidence indicates that providing patients with web-based feedback of their health status may improve adherence to treatment and outcomes.