Stanley, Damian A. and Sokol-Hessner, Peter and Fareri, Dominic S. and Perino, Michael T. and Delgado, Mauricio R. and Banaji, Mahzarin R. and Phelps, Elizabeth A. (2012) Race and reputation: perceived racial group trustworthiness influences the neural correlates of trust decisions. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 367 (1589). pp. 744-753. ISSN 0962-8436 http://resolver.caltech.edu/CaltechAUTHORS:20120305-161423874
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Decisions to trust people with whom we have no personal history can be based on their social reputation—a product of what we can observe about them (their appearance, social group membership, etc.)—and our own beliefs. The striatum and amygdala have been identified as regions of the brain involved in trust decisions and trustworthiness estimation, respectively. However, it is unknown whether social reputation based on group membership modulates the involvement of these regions during trust decisions. To investigate this, we examined blood-oxygenation-level-dependent (BOLD) activity while participants completed a series of single-shot trust game interactions with real partners of varying races. At the time of choice, baseline BOLD responses in the striatum correlated with individuals' trust bias—that is, the overall disparity in decisions to trust Black versus White partners. BOLD signal in the striatum was higher when deciding to trust partners from the race group that the individual participant considered less trustworthy overall. In contrast, activation of the amygdala showed greater BOLD responses to Black versus White partners that scaled with the amount invested. These results suggest that the amygdala may represent emotionally relevant social group information as a subset of the general detection function it serves, whereas the striatum is involved in representing race-based reputations that shape trust decisions.
|Additional Information:||© 2012 The Royal Society. All procedures were approved by the University Committee on Activities Involving Human Subjects at New York University. The collection of photos and responses for the trustee partner database was additionally approved by the Institutional Review Board of Rutgers University. We thank K. Sanzenbach and the Center for Brain Imaging at New York University for technical assistance. This work was supported by a grant from the Macarthur Foundation Law and Neuroscience Network.|
|Subject Keywords:||trust game; race bias; reputation; functional magnetic resonance imaging; decision-making|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||13 Mar 2012 18:03|
|Last Modified:||13 Mar 2012 18:03|
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