Cited by 90Neuroendocrine regulation and behaviorExperimental Behavioral Economics StudiesEvolutionary Psychology and Human Behavior

U-shaped relation between plasma oxytocin levels and behavior in the trust game

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Zhong, Songfa, Monakhov, Mikhail, Mok, Helen P., Tong, Terry, Lai, Poh San, Chew, Soo Hong, Ebstein, Richard P.·2012·PLoS ONE

Abstract

Trust underpins much of social and economic exchanges across human societies. In experimental economics, the Trust Game has served as the workhorse for the study of trust in a controlled incentivized setting. Recent evidence using intranasal drug administration, aka 'sniffing', suggests that oxytocin (OT) can function as a social hormone facilitating trust and other affiliative behaviors. Here we hypothesized that baseline plasma OT is a biomarker that partially predicts the degree of trust and trustworthiness observed in the trust game. Using a large sample of 1,158 participants, we observed a significant U-shaped relationship between plasma OT with the level of trust, and marginally with the level of trustworthiness, especially among males. Specifically, subjects with more extreme levels of plasma OT were more likely to be trusting as well as trustworthy than those with moderate levels of plasma OT. Our results contribute to a deeper understanding of the biological basis of human trust and underscore the usefulness of peripheral plasma OT measures in characterizing human social behavior.

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  • Many papers have used an ELISA on unextracted plasma and obtained oxytocin values above 300 pg/ml.

    “However, many papers have used an ELISA on unextracted plasma, yielding values of >300pg/ml (59)(60)(61)(62)(63)(64)(65).”

    From Intranasal Oxytocin: Myths and Delusions (2016) · cites this paper as [60]

  • Most human studies report a lack of sex differences in plasma OT.

    “most human studies report a lack of sex differences in plasma OT”
  • Studies investigating a link between plasma oxytocin levels and trust behavior in experimental settings have yielded mixed results.

    “However, studies investigating a link between plasma OT levels and trust behavior in experimental settings (trust game paradigms), have yielded mixed results with some studies reporting tentative links (Zak et al., 2005;Zhong et al., 2012), while others failed to reveal a significant correlation (Christensen et al., 2014).”

    From Long-term oxytocin administration enhances the experience of attachment (2017) · cites this paper as Zhong et al., 2012

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Authors
Zhong, S., Monakhov, M., Mok, H. P., Tong, T., Lai, P. S., Chew, S. H., & Ebstein, R. P.
Affiliations
National University of Singapore (SG)
Corresponding author
Ebstein, Richard P.
Venue
PLoS ONE
Published
2012-12-05
Volume
7
Issue
12
Pages
e51095
ISSN
1932-6203 (ISSN-L)
OpenAlex
W1984642682
Cited by
90
References
64
Citations by year
2024: 1 · 2023: 2 · 2022: 4 · 2021: 18 · 2020: 3 · 2019: 5 · 2018: 12 · 2017: 10 · 2016: 5 · 2015: 14 · 2014: 9 · 2013: 7
FWCI
14.44
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Figshare (submittedVersion, cc-by)
  • National University of Singapore (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Funders
  • John Templeton Foundation
  • Ministry of Education, India
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Social Sciences › Safety Research › Experimental Behavioral Economics Studies
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Evolutionary Psychology and Human Behavior
Keywords
oxytocin, plasma oxytocin, trust, trust game, trustworthiness, U-shaped relationship, sex differences, social behavior, intranasal oxytocin
MeSH terms
Female, Games, Experimental, Humans, Male, Oxytocin, Social Behavior, Linear Models, Trust, Young Adult

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