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Social Justice Research

, Volume 30, Issue 4, pp 355–380 | Cite as

Who Can Deviate from the Party Line? Political Ideology Moderates Evaluation of Incongruent Policy Positions in Insula and Anterior Cingulate Cortex

  • Ingrid Johnsen HaasEmail author
  • Melissa N. Baker
  • Frank J. Gonzalez
Article

Abstract

Political polarization at the elite level is a major concern in many contemporary democracies, which is argued to alienate large swaths of the electorate and prevent meaningful social change from occurring, yet little is known about how individuals respond to political candidates who deviate from the party line and express policy positions incongruent with their party affiliations. This experiment examines the neural underpinnings of such evaluations using functional MRI (fMRI). During fMRI, participants completed an experimental task where they evaluated policy positions attributed to hypothetical political candidates. Each block of trials focused on one candidate (Democrat or Republican), but all participants saw two candidates from each party in a randomized order. On each trial, participants received information about whether the candidate supported or opposed a specific policy issue. These issue positions varied in terms of congruence between issue position and candidate party affiliation. We modeled neural activity as a function of incongruence and whether participants were viewing ingroup or outgroup party candidates. Results suggest that neural activity in brain regions previously implicated in both evaluative processing and work on ideological differences (insula and anterior cingulate cortex) differed as a function of the interaction between incongruence, candidate type (ingroup versus outgroup), and political ideology. More liberal participants showed greater activation to incongruent versus congruent trials in insula and ACC, primarily when viewing ingroup candidates. Implications for the study of democratic representation and linkages between citizens’ calls for social change and policy implementation are discussed.

Keywords

Political ideology Candidate evaluation Policy attitudes Incongruence fMRI Anterior cingulate cortex Insular cortex 

Notes

Acknowledgements

The Political Attitudes and Cognition Lab and MRI Users Group at the University of Nebraska-Lincoln provided useful feedback on this work, as did guest editor Hannah Nam and two anonymous reviewers. Additional thanks to undergraduate research assistants Allison Haindfield, Grace Stallworth, and Sarah Sweeney and MRI Technologist Joanne Murray for assistance with data collection.

Funding

This work was supported by the University of Nebraska-Lincoln Office for Research and Economic Development, Center for Brain, Biology, and Behavior, College of Arts and Sciences, and Department of Political Science.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical Approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

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© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Department of Political Science and Center for Brain, Biology, and BehaviorUniversity of Nebraska-LincolnLincolnUSA
  2. 2.Department of Political ScienceUniversity of California-MercedMercedUSA
  3. 3.School of Government and Public PolicyUniversity of ArizonaTucsonUSA

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