How does the social nature of focus groups shape what researchers learn about preferences? This article delineates three preference types—private, publicly expressed, and group preferences—and introduces a new method for measuring each in a focus group setting. Original data on people’s preferences for punishing rape, wife beating, and theft across 80 focus groups in 20 villages in eastern Democratic Republic of Congo reveal clear differences across preference types, featuring more extreme punishment preferences in the public sphere. A within-subject experiment also shows that focus group discussions affect people’s private preferences by making them more extreme, which has ethical implications for researchers who use focus groups worldwide. The social nature of preferences observed in Democratic Republic of Congo underscores that scholars must adopt clear and transparent approaches to data comparison to learn about sensitive issues in the face of contested norms.