title: Neural mechanisms underlying social conformity in an ultimatum game.
abstract: When individuals' actions are incongruent with those of the group they belong to, they may change their initial behavior in order to conform to the group norm. This phenomenon is known as "social conformity." In the present study, we used event-related functional magnetic resonance imaging (fMRI) to investigate brain activity in response to group opinion during an ultimatum game. Results showed that participants changed their choices when these choices conflicted with the normative opinion of the group they were members of, especially in conditions of unfair treatment. The fMRI data revealed that a conflict with group norms activated the brain regions involved in norm violations and behavioral adjustment. Furthermore, in the reject-unfair condition, we observed that a conflict with group norms activated the medial frontal gyrus. These findings contribute to recent research examining neural mechanisms involved in detecting violations of social norms, and provide information regarding the neural representation of conformity behavior in an economic game.
authors.affiliation: Key Laboratory of Cognition and Personality of Ministry of Education, School of Psychology, Southwest University Chongqing, China.
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Wei
authors.affiliation: Key Laboratory of Cognition and Personality of Ministry of Education, School of Psychology, Southwest University Chongqing, China.
authors.forename: Zhiying
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Cognition and Personality of Ministry of Education, School of Psychology, Southwest University Chongqing, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zheng
keywords: behavioral change; fMRI; social conformity; ultimatum game; unfair treatment