Evidence map›Paper›PMID 32333423›Full record

ArticleAmerican journal of primatology2020

Low relationship quality predicts scratch contagion during tense situations in orangutans (Pongo pygmaeus).

Daan W Laméris, Evy van Berlo, Elisabeth H M Sterck, Thomas Bionda, Mariska E Kret

Abstract read
In one paragraph

Article in American journal of primatology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed.

  1. The play fever: individual and group factors influence the contagion of play behaviour within social hominid groups.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2026
    Article
  2. The development of play face mimicry: comparative insights from human infants, adults and orangutans.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Emotions spread like contagious diseases.Frontiers in psychology · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. How video calls affect mimicry and trust during interactions.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023
    Article
  13. Article
  14. Robert Provine: the critical human importance of laughter, connections and contagion.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022
    Review
  15. Article
  16. Article
  17. Social contagion of affiliation in female macaques.Royal Society open science · 2021
    Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Daan W LamérisInstitute of Psychology, Faculty of Social Sciences, Cognitive Psychology Unit, Leiden University, Leiden, The Netherlands.ORCID 0000-0002-3096-7920
Evy van BerloInstitute of Psychology, Faculty of Social Sciences, Cognitive Psychology Unit, Leiden University, Leiden, The Netherlands.ORCID 0000-0002-5523-7721
Elisabeth H M SterckDepartment of Biology, Animal Ecology Research Group, Utrecht University, Utrecht, The Netherlands.ORCID 0000-0003-1101-6027
Thomas BiondaApenheul Primate Park, Apeldoorn, The Netherlands.
Mariska E KretInstitute of Psychology, Faculty of Social Sciences, Cognitive Psychology Unit, Leiden University, Leiden, The Netherlands.ORCID 0000-0002-3197-5084

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Primates show various forms of behavioral contagion that are stronger between kin and friends. As a result, behavioral contagion is thought to promote group coordination, social cohesion, and possibly state matching. Aside from contagious yawning, little is known about the contagious effect of other behaviors. Scratching is commonly observed during arousal and as such may play a role within group dynamics. While the Bornean orangutan (Pongo pygmaeus) is commonly considered the least social great ape, orangutans do engage in social interactions. Therefore, their social organization makes them a suitable case for studying the social function of behavioral contagion. Through behavioral observations of captive orangutans, we recorded all yawn and scratch events together with the corresponding behavior of all bystander group-members. As yawning was rarely observed, no conclusions could be drawn regarding this behavior. Scratching was contagious and occurred within 90 s after the triggering scratch. Specifically, orangutans showed increased scratch contagion when they had seen a weakly bonded individual scratch during tense contexts. When the orangutan had not seen the triggering scratch, the contagiousness of scratching was not affected by context or relationship quality. Our results indicate that behavioral contagion is not simply higher between individuals with stronger social relationships, but that the contagiousness of behaviors may vary based on the context and on social factors. We discuss these findings in light of an adaptive function that may reduce aggression.

Indexed as

Behavior, AnimalSocial BehaviorAnimalsFemaleMalePongo pygmaeusYawningarousalbehavioral contagiongreat apeorangutanscratching

Identifiers

PMID32333423
PMCPMC7379188

What OpenQuestion holds

Textmetadata
LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.