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The epistemic advantages of representative deliberation
William J Berger1, Daniel J Singer2, Patrick Grim3,4
1Department of Philosophy, University at Buffalo, Buffalo, New York, United States of America.
Plos One
|July 17, 2026
Summary
Representative deliberation, where a subset acts for a group, can be as good as or better than full group deliberation. This is due to evidence selection and belief resetting, improving collective judgment.
Area of Science:
- Social Sciences
- Computational Social Science
- Decision Making
Background:
- The
- wisdom of the crowds
- theory suggests larger groups yield better collective judgments.
- Representative deliberation, a subset acting for a larger group, is often assumed to be epistemically inferior to full deliberation.
Purpose of the Study:
- To computationally model and test the epistemic performance of representative deliberation versus full deliberation.
- To identify the mechanisms driving performance differences between these two structures.
Main Methods:
- Agent-based modeling was employed to simulate deliberative processes.
- Simulations varied deliberation length, evidence distribution, problem difficulty, and agent memory capacity.
- Collective belief accuracy was measured against an objective truth.
Main Results:
- Representative deliberation frequently matched or outperformed full deliberation in epistemic accuracy.
- This advantage was not due to the inherent epistemic ability of representatives.
- Structural features, including evidence triage and belief resetting, were identified as key factors.
Conclusions:
- Representative deliberation structures can be an epistemic asset, not a liability.
- The constraints imposed by representative structures can enhance collective judgment accuracy.
- Findings challenge the conventional wisdom that larger groups are always superior for decision-making.
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