I study political behavior, using quantitative methods to investigate processes of political decision-making and opinion formation. My current focus is on how collaboration can shape the way we perceive and treat others, including the effects of collaboration on politically important outcomes like trust, tolerance, and willingness to sacrifice. I am also interested in the interaction between partisanship and information-use, especially within the context of climate change. Other recent projects include studies of voter turnout, candidate extremism, the relationship between economic behavior and partisanship, and the role of partisanship in the interpretation of scientific evidence. I also have research interests in methodology and epistemology, including the role of replication in the scientific process and how scientific information is incorporated into public opinion and public policy.