Journal
PSYCHOLOGICAL SCIENCE
Volume 22, Issue 7, Pages 894-900Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/0956797611411057
Keywords
social influence; reward; nucleus accumbens; orbitofrontal cortex
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Social influence-individuals' tendency to conform to the beliefs and attitudes of others-has interested psychologists for decades. However, it has traditionally been difficult to distinguish true modification of attitudes from mere public compliance with social norms; this study addressed this challenge using functional neuroimaging. Participants rated the attractiveness of faces and subsequently learned how their peers ostensibly rated each face. Participants were then scanned using functional MRI while they rated each face a second time. The second ratings were influenced by social norms: Participants changed their ratings to conform to those of their peers. This social influence was accompanied by modulated engagement of two brain regions associated with coding subjective value-the nucleus accumbens and orbitofrontal cortex-a finding suggesting that exposure to social norms affected participants' neural representations of value assigned to stimuli. These findings document the utility of neuroimaging to demonstrate the private acceptance of social norms.
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