My graduate research at the Media Lab focused on building a class of preventive medicine using portable and wireless tools that empower patients with insight into their conditions and appropriate community support. While our current health systems are suitable for tackling acute care, patients carry the onerous burden of managing chronic conditions where healthy behavior is of essence, and regular monitoring is necessary. By giving feedback on their continually changing physiology, I studied how patients could learn to develop accurate mental models of their conditions. Two such projects are DiaBetNet, one of the first wireless mobile games for disease management and HiRoller, a speech and game based self-monitoring aid for patients with mood disorders. In a project through Media Lab Asia called Ca:sh, I studied how handhelds could be used to assist rural health workers in India promote healthy behaviors amongst mothers and children.