fMRI Repetition Suppression During Generalized Social Categorization
Open accessAbstract
Correctly identifying friends and foes is integral to successful group living. Here, we use repetition suppression to examine the neural circuitry underlying generalized group categorization—the process of categorizing in-group and out-group members across multiple social categories. Participants assigned to an arbitrary team (i.e., Eagles or Rattlers) underwent fMRI while categorizing political and arbitrary in-group and out-group members. We found that frontoparietal control network exhibited repetition suppression in response to “identical in-group” (Democrat-Democrat or Eagles-Eagles) and “different in-group” (Eagles-Democrat or Democrat-Eagles) trials relative to “out-group/in-group trials” (Republican-Democrat or Rattler-Eagles). Specifically, the repetition suppression contrast map included bilateral superior parietal lobule, bilateral dorsolateral prefrontal cortex (DLPFC), and bilateral middle temporal gyrus. Participants who reported an increased tendency to join and value their social groups exhibited decreased repetition suppression in bilateral DLPFC. Comparison of our whole-brain repetition suppression map with an independently identified map of frontoparietal control network revealed 34.3% overlap. Social categorization requires recognizing both a target’s group membership but also the target’s orientation toward one’s self. Fittingly, we find that generalized social categorization engages a network that acts as a functional bridge between dorsal attentional (exogenously-oriented) and default mode (internally-oriented) networks.
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Decreased signal with repeated stimulus presentation has been used as a tool for structure-function brain mapping, as it is thought that signal decreases reflect neuronal populations that represent and detect change in stimulus features.
“Decreased signal with repeated stimulus presentation has been used as a tool for structure-function brain mapping, as it is thought that signal decreases reflect neuronal populations that represent and detect change in stimulus features”
From Feeling left out or just surprised? Neural correlates of social exclusion and overinclusion in adolescence (2020) · cites this paper as Lau & Cikara, 2017
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References 76 · Cited by 14
Research works printed but not linked: 1
- [1]Allport, G. W. The nature of prejudice (Addison-Wesley, 1954).
- Authors
- Lau, T., & Cikara, M.
- Affiliations
- Harvard University (US)
- Corresponding author
- Cikara, Mina
- Venue
- Scientific Reports
- Published
- 2017-06-27
- Volume
- 7
- Issue
- 1
- Pages
- 4262-4262
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC5487342
- OpenAlex
- W2693132037
- Cited by
- 14
- References
- 76
- Citations by year
- 2026: 1 · 2024: 1 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 3 · 2018: 3
- FWCI
- 5.60
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Topics
- Social Sciences › Sociology and Political Science › Social and Intergroup Psychology
- Life Sciences › Neuroscience › Cognitive Neuroscience › Face Recognition and Perception
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
- Keywords
- repetition suppression, frontoparietal network, dorsolateral prefrontal cortex, superior parietal lobule, middle temporal gyrus, political categorization, dorsal attention network, default mode network, group membership
- MeSH terms
- Adult, Brain, Brain Mapping, Female, Humans, Magnetic Resonance Imaging, Male, Psychology, Social, Quantitative Trait, Heritable, Young Adult
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