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Amygdala structure and the tendency to perceive the social system as legitimate and desirable

journal contribution
posted on 2023-06-09, 08:20 authored by Hannah H Nam, John T Jost, Lisa Kaggen, Dan Campbell-MeiklejohnDan Campbell-Meiklejohn, Jay J Van Bavel
Individual variation in preferences to maintain vs. change the societal status quo can play out in the political realm by choosing leaders and policies that reinforce or undermine existing inequalities. We sought to understand which individuals are likely to defend or challenge inequality in society by exploring the neuroanatomical substrates of system justification tendencies. In two independent neuroimaging studies, we observed that larger bilateral amygdala volume was positively correlated with the tendency to believe that the existing social order was legitimate and desirable. These results held for members of advantaged and disadvantaged groups (men and women). Furthermore, individuals with larger amygdala volume were less likely to participate in subsequent protest movements. We ruled out alternative explanations in terms of attitudinal extremity and political orientation per se. Exploratory whole brain analyses suggested that system justification effects may extend to structures adjacent to the amygdala, including parts of the insula and orbitofrontal cortex. These findings suggest that the amygdala may provide a neural substrate for maintaining the status quo, and opens avenues for further investigation linking system justification and other neuroanatomical regions.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Nature Human Behaviour

ISSN

2397-3374

Publisher

Nature Publishing Group

Volume

2

Page range

133-138

Department affiliated with

  • Psychology Publications

Research groups affiliated with

  • Sussex Neuroscience Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2017-10-17

First Open Access (FOA) Date

2018-06-04

First Compliant Deposit (FCD) Date

2017-10-17

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