Evidence map›Paper›PMID 30963904›Full record

ArticleProceedings. Biological sciences2018

Observing grooming promotes affiliation in Barbary macaques.

Juliette M Berthier, Stuart Semple

Abstract read
In one paragraph

Article in Proceedings. Biological sciences, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing 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

16 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. Oxytocin in the Amygdala Sustains Prosocial Behavior via State-Dependent Amygdala-Prefrontal Modulation.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  3. Article
  4. Article
  5. Article
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  7. Group-level signatures in bonobo sociality.Evolutionary human sciences · 2024
    Article
  8. Article
  9. Review
  10. Article
  11. Yawn contagion in bonobos: Another group, another story.American journal of primatology · 2022
    Article
  12. Article
  13. Article
  14. Emotional contagion in nonhuman animals: A review.Wiley interdisciplinary reviews. Cognitive science · 2022
    Review
  15. Social contagion of affiliation in female macaques.Royal Society open science · 2021
    Article
  16. 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

2 authors.

Juliette M BerthierCentre for Research in Evolutionary, Social and Interdisciplinary Anthropology, University of Roehampton , London SW15 4JD , UK.
Stuart SempleCentre for Research in Evolutionary, Social and Interdisciplinary Anthropology, University of Roehampton , London SW15 4JD , UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Observing friendly social interactions makes people feel good and, as a result, then act in an affiliative way towards others. Positive visual contagion of this kind is common in humans, but whether it occurs in non-human animals is unknown. We explored the impact on female Barbary macaques of observing grooming, a behaviour that physiological and behavioural studies indicate has a relaxing effect on the animals involved. We compared females' behaviour between two conditions: after observing conspecifics groom, and in a matched control period. We found that observing grooming was associated with reduced behavioural indicators of anxiety, suggesting that seeing others groom is, in itself, relaxing. Observing grooming was also associated with a shorter latency to becoming involved in a grooming bout (and higher likelihood both of initiating that bout and being the groomer rather than groomee), and with elevated rates of other affiliative behaviours. These results provide evidence for positive visual contagion; this phenomenon may contribute fundamentally to group cohesion not just in this species, but also in the many mammal and bird species where grooming occurs. Our study highlights the importance of exploring social behaviour beyond the level of the interacting individuals, within the broader social context where it occurs.

Indexed as

GroomingSocial BehaviorAnimalsAnxietyFemaleMacacaaudiencecooperationeavesdropprimatesocialsocial network

Identifiers

PMID30963904
PMCPMC6304063

What OpenQuestion holds

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Registered trials

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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.