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Related Experiment Video

Updated: Jun 7, 2026

The Collective Trust Game: An Online Group Adaptation of the Trust Game Based on the HoneyComb Paradigm

The Collective Trust Game: An Online Group Adaptation of the Trust Game Based on the HoneyComb Paradigm

Published on: October 20, 2022

Cooperation under indirect reciprocity and imitative trust.

Serguei Saavedra¹, David Smith, Felix Reed-Tsochas

¹Northwestern Institute on Complex Systems, Northwestern University, Evanston, Illinois, United States of America. s-saavedra@northwestern.edu

|November 5, 2010

Summary

Social imitation can promote cooperation, even when reputations are unknown. However, too much imitation can reverse cooperative behaviors, highlighting the complex nature of social dynamics in evolutionary game theory.

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The HoneyComb Paradigm for Research on Collective Human Behavior

The HoneyComb Paradigm for Research on Collective Human Behavior

Published on: January 19, 2019

Related Experiment Videos

Last Updated: Jun 7, 2026

The Collective Trust Game: An Online Group Adaptation of the Trust Game Based on the HoneyComb Paradigm

The Collective Trust Game: An Online Group Adaptation of the Trust Game Based on the HoneyComb Paradigm

Published on: October 20, 2022

The HoneyComb Paradigm for Research on Collective Human Behavior

The HoneyComb Paradigm for Research on Collective Human Behavior

Published on: January 19, 2019

Area of Science:

Evolutionary game theory
Behavioral economics
Social dynamics

Background:

Indirect reciprocity explains altruism in self-regarding individuals, even without repeated interactions.
Humans use complex strategies combining reciprocity and social imitation for cooperation.
The impact of imitation on cooperation, especially with limited reputation information, is not well understood.

Purpose of the Study:

To investigate how social imitation affects cooperation in evolutionary models.
To introduce and analyze an "imitative trust" score alongside traditional reputation scores.
To understand the conditions under which imitation favors or hinders cooperation.

Main Methods:

Extended existing evolutionary models of indirect reciprocity.
Incorporated an "imitative trust" score tracking past cooperation reception.
Analyzed the interplay between imitative trust, reputation scores, and cooperation levels.

Main Results:

Imitative trust can coexist with indirect reciprocity up to a certain threshold, after which cooperation declines.
When reputation information is limited, imitation leads to higher collective cooperation than random or share-alike strategies.
Social imitation emerges as an adaptive mechanism under specific conditions.

Conclusions:

Cooperation is complex and can be reversed by excessive imitation.
Imitation is beneficial for collective cooperation when reputation information is scarce.
This study provides new insights into the adaptive role of social imitation in cooperative populations.