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Study · Randomized controlled trial · 2011

2 results

Oxytocin promotes human ethnocentrism.

De Dreu CK, Greer LL, Van Kleef GA, Shalvi S, Handgraaf MJ

Proceedings of the National Academy of Sciences of the United States of America10 Jan 2011Cited by 379 (Europe PMC)

PMID21220339 (opens in a new tab)PMCIDPMC3029708 (opens in a new tab)DOI10.1073/pnas.1015316108 (opens in a new tab)PepBankPUB-21220339
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Summary

The text of this summary is not shown here, because the article license does not allow reuse. Read it at the source (opens in a new tab)

Text rights: Publisher copyright. Results still quote short attributed sentences.

Results from this study2

2 results from studies that gave the peptide. 2 results from people.

  1. 01HumanRandomized controlled trialEfficacy outcome

    In men, oxytocin increased in-group favoritism compared with placebo in computer tasks of ethnocentrism.

    In plain wordsIn men, oxytocin increased favoring of one's own group compared with placebo in computer tasks.

    Peptide
    Oxytocin
    Outcome
    IncreaseIn-group favoritism
    Study

    n: not reported in source

    Comparator
    Placebo
    Outcome group
    Social behavior and cognition · Mental health and mood
    Studied dose
    Dose not stated

    Source sentences

    Summary
    Results show that oxytocin creates intergroup bias because oxytocin motivates in-group favoritism
    1 context sentence
    Summary · context
    In double-blind, placebo-controlled designs, males self-administered oxytocin or placebo and privately performed computer-guided tasks to gauge different manifestations of ethnocentric in-group favoritism as well as out-group derogation.
  2. 02HumanRandomized controlled trialEfficacy outcome

    In men, oxytocin increased out-group derogation compared with placebo, to a lesser extent than in-group favoritism.

    In plain wordsIn men, oxytocin slightly increased negative views of an outside group compared with placebo, less than it increased favoring of one's own group.

    Peptide
    Oxytocin
    Outcome
    IncreaseOut-group derogation
    Study

    n: not reported in source

    Comparator
    Placebo
    Outcome group
    Social behavior and cognition · Mental health and mood
    Studied dose
    Dose not stated

    Source sentences

    Summary
    Results show that oxytocin creates intergroup bias because oxytocin motivates in-group favoritism and, to a lesser extent, out-group derogation.
    1 context sentence
    Summary · context
    In double-blind, placebo-controlled designs, males self-administered oxytocin or placebo and privately performed computer-guided tasks to gauge different manifestations of ethnocentric in-group favoritism as well as out-group derogation.

AI wrote and checked these results. AI can make mistakes, so check important results against the source.

Registered trials1

Trials this study reports on, or that list this study as a reference. Registry data from ClinicalTrials.gov.

1 trial · 1 completed · 1 with posted results · source ClinicalTrials.gov (opens in a new tab)

CompletedPhase 1Results postedNCT01834261

Brain Dynamics of Oxytocin

Stony Brook Universityn = 51Apr 2013 to May 2015

Brain Dynamics in Healthy Adults

Trial pageClinicalTrials.govUpdated 17 Mar 2017

Version history

PepBank keeps every version of the data on this study. Status changes from Retraction Watch, Europe PMC and Crossref are listed with their source.

  1. Version 2Current

    11 Oct 2026, 01:30 UTC

    Study results updated

  2. Version 1

    9 Oct 2026, 02:50 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

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