Cited by 3,690Neuroendocrine regulation and behaviorExperimental Behavioral Economics StudiesEvolutionary Psychology and Human Behavior

Oxytocin increases trust in humans

Open access
Kosfeld, Michael, Heinrichs, Markus, Zak, Paul J., Fischbacher, Urs, Fehr, Ernst·2005·Nature

Abstract

Trust pervades human societies. Trust is indispensable in friendship, love, families and organizations, and plays a key role in economic exchange and politics. In the absence of trust among trading partners, market transactions break down. In the absence of trust in a country's institutions and leaders, political legitimacy breaks down. Much recent evidence indicates that trust contributes to economic, political and social success. Little is known, however, about the biological basis of trust among humans. Here we show that intranasal administration of oxytocin, a neuropeptide that plays a key role in social attachment and affiliation in non-human mammals, causes a substantial increase in trust among humans, thereby greatly increasing the benefits from social interactions. We also show that the effect of oxytocin on trust is not due to a general increase in the readiness to bear risks. On the contrary, oxytocin specifically affects an individual's willingness to accept social risks arising through interpersonal interactions. These results concur with animal research suggesting an essential role for oxytocin as a biological basis of prosocial approach behaviour.

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Crossref · 10.1038/nature03701

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  • Oxytocin is involved in nursing behavior, trust, and 'mind-reading'.

    “Oxytocin is also involved in nursing behavior, trust, and “mind-reading” (Domes et al. 2007; Kosfeld et al. 2005)”

    From Natural Selection, Childrearing, and the Ethics of Marriage (and Divorce): Building a Case for the Neuroenhancement of Human Relationships (2012) · cites this paper as Kosfeld et al. 2005

    The Abstract reports that intranasal oxytocin increased trust in humans and describes its role in milk letdown and maternal care, which supports the nursing-related part. Our copy does not address “mind-reading” (searched for mental-state and emotion recognition), so Kosfeld et al. does not support that part of the sentence. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Neuroimaging studies in humans have largely substantiated the view that human attachment relies on conserved hormonal machinery.

    “Neuroimaging studies in humans have largely substantiated this view.”

    From Could intranasal oxytocin be used to enhance relationships? Research imperatives, clinical policy, and ethical considerations (2013) · cites this paper as [43]

    The Abstract (page unavailable) reports that oxytocin, implicated in attachment in non-human mammals, increased trust in humans. This supports a related role for oxytocin in human social behavior, but the study used a behavioral trust game, not neuroimaging, and did not establish that human attachment relies on conserved hormonal machinery. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • In persons without known developmental or psychiatric disorders, intranasal oxytocin increases social affiliation, social memory, and empathy.

    “In persons without known developmental or psychiatric disorders, the use of intranasal oxytocin increases social affiliation, social memory, and empathy.2–5”

    From Intranasal Oxytocin in Children and Adolescents with Autism Spectrum Disorder (2021) · cites this paper as [2]

    The Subjects section describes healthy male students who received intranasal oxytocin or placebo; significant psychiatric illness was an exclusion criterion. The Abstract and LETTERS report increased trust in social interactions, which supports the social-affiliation aspect, but the paper does not report increases in social memory or empathy. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • Intranasal oxytocin administration increases bonding-related behavior, including gaze to the eye region, interpersonal trust and empathy, and social cognition.

    “In humans, intranasal administration of OT was found to increase bonding-related behavior, including gaze to eye region (Guastella et al., 2008), interpersonal trust and empathy (Hurlemann et al., 2010; Kosfeld et al., 2005), and social cognition (Kirsch et al., 2005).”

    From Oxytocin during the initial stages of romantic attachment: Relations to couples’ interactive reciprocity (2012) · cites this paper as Kosfeld et al., 2005

    The Abstract and LETTERS report that intranasal oxytocin increased trusting behavior in humans. They do not report an increase in empathy, which the citing sentence groups with interpersonal trust under the Kosfeld citation. Gaze to the eye region and social cognition are attributed to other cited papers in that sentence. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • It is possible to alter preferences and personality through experiments that change the brain's chemistry.

    “A few recent studies show that it is possible to alter preferences and personality through experiments that change the brain's chemistry.”

    From Personality Psychology and Economics (2011) · cites this paper as Kosfeld, Heinrichs, Zak et al. [2005]

    The LETTERS section (page not provided) reports that intranasal oxytocin increased investors’ trusting behaviour compared with placebo, supporting the claim that changing brain chemistry can alter behaviour in an experiment. It does not establish a change in personality, or show that preferences generally can be altered. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

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Authors
Kosfeld, M., Heinrichs, M., Zak, P. J., Fischbacher, U., & Fehr, E.
Affiliations
  • University of Zurich (CH)
  • Claremont Graduate University (US)
Corresponding author
  • Heinrichs, Markus
  • Fehr, Ernst
Venue
Nature
Published
2005-06
Volume
435
Issue
7042
Pages
673-676
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2138559331
Cited by
3,690
References
31
Citations by year
2026: 78 · 2025: 92 · 2024: 111 · 2023: 128 · 2022: 134 · 2021: 209 · 2020: 205 · 2019: 233 · 2018: 184 · 2017: 186 · 2016: 208 · 2015: 232 · 2014: 260 · 2013: 238 · 2012: 236
FWCI
148.55
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (publishedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, other-oa)
  • Research Bank (Australian Catholic University) (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
  • National Science Foundation
  • John D. and Catherine T. MacArthur Foundation
  • Cogito Foundation
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
  • Universität Zürich
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, trust, social risk, prosocial behavior, social attachment, neuropeptides, intranasal administration, interpersonal interaction, risk-taking
MeSH terms
Administration, Intranasal, Adult, Games, Experimental, Humans, Investments, Male, Oxytocin, Surveys and Questionnaires, Risk, Social Behavior, Trust

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