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Partisans process policy-based and identity-based messages using dissociable neural systems.

Nir Jacoby1,2, Marika Landau-Wells3, Jacob Pearl4

  • 1Department of Psychological and Brain Sciences, Dartmouth College, Moore Hall, 3 Maynard St, Hanover, NH 03755, USA.

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|September 13, 2024
PubMed
Summary
This summary is machine-generated.

Political partisanship influences perception through policy or identity lenses. Neuroimaging reveals distinct brain mechanisms for processing policy versus identity-based political messaging, impacting social and affective responses.

Keywords:
neural synchronyneuroimagingpolitical partisanshipsocial neuroscience

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Area of Science:

  • Social Neuroscience
  • Political Psychology

Background:

  • Political partisanship shapes how individuals perceive political events.
  • Two types of partisan lenses exist: policy-based and identity-based.
  • Mechanisms underlying these partisan lenses are not well understood.

Purpose of the Study:

  • To investigate the neural mechanisms of policy-based and identity-based partisan discourse.
  • To identify how different forms of partisanship affect brain activity.

Main Methods:

  • Collected neuroimaging data from participants viewing partisan political messages.
  • Analyzed neural synchrony differences between ingroup and outgroup responses.
  • Identified a "partisan lens effect" based on neural synchrony.

Main Results:

  • Policy-based messaging activated socio-political reasoning and affective regions.
  • Identity-based attacks activated mentalizing and affective regions.
  • Distinct neural mechanisms were observed for policy versus identity appeals.

Conclusions:

  • Processing of political discourse involves distinguishable neural and psychological mechanisms based on partisanship type.
  • Findings offer insights into political perception and potential interventions for partisan division.