Dr. Stern's research broadly examines how belief systems and motivations guide the way that people perceive and interact with the world. One central line of work concerns how political belief systems (e.g., whether a person is liberal or conservative) shape the way in which people evaluate and categorize others based on group membership (e.g., race, sex, and sexual orientation). Another line of work examines consensus in political groups, and the implications of both perceived and actual attitude consensus for individual behavior (e.g., voting) and large-scale societal outcomes (e.g., levels of societal stability).