In this project we test two interventions designed to reduce clinical inertia. The Cognitive Behavioral Intervention (CBI) is directed at individual primary care physicians and has three components: (a) analyze each physician's clinical moves with diabetes patients to identify patterns that indicate clinical inertia, (b) engage each physician in a series of simulated clinical cases to assess the underlying causes of clinical inertia, and (c) provide each physician with a series of tailored simulated clinical scenarios that are designed to correct the failures of thinking and decision making that result in that physician's observed patterns of clinical inertia. The CBI intervention is based on recent work in cognitive science and learning theory and has been successfully applied in other research and educational settings.