Should Individuals Think Like Their Group? A Descriptive-to-Prescriptive Tendency Toward Group-Based Beliefs.

Across three pre-registered studies with children (ages 4-9) and adults (N = 303), we examined whether how a group is predicted evaluations of how group members should be (i.e., a descriptive-to-prescriptive tendency), under conditions in which the descriptive group norms entailed beliefs that were fact-based (Study 1), opinion-based (Study 2), and ideology-based (Study 3). Overall, participants tended to disapprove of individuals with beliefs that differed from their group, but the extent of this tendency varied across development and as a function of the belief under consideration (e.g., younger children did not show a descriptive-to-prescriptive tendency in the context of facts and ideologies, suggesting that they prioritized truth over group norms). Implications for normative reasoning and ideological polarization are discussed.