Distinct contributions of the amygdala and parahippocampal gyrus to suspicion in a repeated bargaining game.

Proceedings of the National Academy of Sciences of the United States of America
Meghana A BhattP Read Montague

Abstract

Humans assess the credibility of information gained from others on a daily basis; this ongoing assessment is especially crucial for avoiding exploitation by others. We used a repeated, two-person bargaining game and a cognitive hierarchy model to test how subjects judge the information sent asymmetrically from one player to the other. The weight that they give to this information is the result of two distinct factors: their baseline suspicion given the situation and the suspicion generated by the other person's behavior. We hypothesized that human brains maintain an ongoing estimate of the credibility of the other player and sought to uncover neural correlates of this process. In the game, sellers were forced to infer the value of an object based on signals sent from a prospective buyer. We found that amygdala activity correlated with baseline suspicion, whereas activations in bilateral parahippocampus correlated with trial-by-trial uncertainty induced by the buyer's sequence of suggestions. In addition, the less credible buyers that appeared, the more sensitive parahippocampal activation was to trial-by-trial uncertainty. Although both of these neural structures have previously been implicated in trustworthiness judgments, the...Continue Reading

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Citations

Jan 24, 2013·Proceedings of the National Academy of Sciences of the United States of America·Jack van HonkBarak Morgan
Feb 10, 2016·Proceedings of the National Academy of Sciences of the United States of America·Claudia BrunnliebMarcus Heldmann
Apr 14, 2017·Social Cognitive and Affective Neuroscience·Anne C LauritaR Nathan Spreng
Jun 21, 2019·The European Journal of Neuroscience·Mario Martinez-SaitoVasily Klucharev
Nov 23, 2017·Frontiers in Human Neuroscience·Qiang LuoJianfeng Feng
Jun 6, 2018·Frontiers in Behavioral Neuroscience·Joe Herbert

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