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Updated: Jul 5, 2025
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Continuous Theta Burst Stimulation of the Posterior Medial Frontal Cortex to Experimentally Reduce Ideological Threat Responses
Published on: September 28, 2018
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Experimental evidence suggests intergroup relations are, by default, neutral rather than aggressive.
Hirotaka Imada1, Nobuhiro Mifune1
1School of Economics & Management, Kochi University of Technology, Kochi City, Kochi, Japan himada2022@gmail.com n.mifune@gmail.com; https://www.kochi-tech.ac.jp/profile/en/mifune-nobuhiro.html.
The Behavioral and Brain Sciences
|January 15, 2024
Summary
People often choose inaction over conflict or cooperation with out-groups. This suggests primitive intergroup aggression, like raiding, may be less likely than previously modeled.
Area of Science:
- Social Psychology
- Behavioral Economics
- Game Theory
Background:
- Intergroup aggression, such as raiding, is a persistent phenomenon.
- Existing game-theoretical models analyze strategies related to conflict and cooperation between groups.
Purpose of the Study:
- To evaluate a game-theoretical analysis of primitive intergroup aggression.
- To investigate the strategy space of intergroup interactions, specifically the omission of 'do-nothing'.
- To compare model predictions with experimental evidence on intergroup behavior.
Main Methods:
- Game-theoretical analysis of intergroup aggression.
- Incorporation of the 'do-nothing' strategy into the model.
- Review of experimental evidence on out-group interactions.
Main Results:
- The original analysis omitted the 'do-nothing' strategy, limiting its applicability.
- Experimental data indicate a strong preference for inaction over engagement (cooperation or attack) with out-group members.
- The omission of 'do-nothing' leads to an overestimation of intergroup aggression likelihood.
Conclusions:
- The strategy space in game-theoretical models of intergroup aggression needs refinement.
- Inaction ('do-nothing') is a crucial, often preferred, strategy in intergroup relations.
- Current models may overestimate the prevalence of intergroup aggression due to incomplete strategy sets.
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