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Related Experiment Video

Updated: Dec 18, 2025

The Collective Trust Game: An Online Group Adaptation of the Trust Game Based on the HoneyComb Paradigm
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A registered replication study on oxytocin and trust.

Carolyn H Declerck1, Christophe Boone1, Loren Pauwels1

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|June 10, 2020
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Summary

Intranasal oxytocin (OT) did not increase trust in strangers during a trust game with minimal social contact. Exploratory findings suggest OT might influence trust in low-trust individuals without social contact, but require further research.

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Area of Science:

  • Neuroscience
  • Social Psychology
  • Behavioral Economics

Background:

  • Intranasal oxytocin (OT) was previously suggested to increase trust.
  • Replication studies on OT and trust have yielded inconclusive results.
  • Previous studies often lacked minimal social contact (MSC) conditions.

Purpose of the Study:

  • To replicate the effect of intranasal oxytocin on trust.
  • To investigate OT's effect on trust under conditions with and without minimal social contact (MSC).
  • To achieve over 95% statistical power for detecting effects.

Main Methods:

  • A large, double-blind, placebo-controlled replication study.
  • Participants played a trust game with either a minimal social contact (MSC) or no-social-contact (NoC) condition.
  • Intranasal oxytocin or placebo was administered.

Main Results:

  • Oxytocin showed no significant effect on trusting behavior in the MSC condition.
  • Exploratory analyses indicated a potential increase in trust for individuals with low dispositional trust in the NoC condition.
  • These post hoc findings require independent confirmation.

Conclusions:

  • Oxytocin does not appear to enhance trust in strangers when minimal social contact is present.
  • The potential role of oxytocin in modulating trust in low-trust individuals in the absence of social contact warrants further investigation.
  • This study underscores the importance of social context in oxytocin's effects on trust.