Evidence map›Paper›PMID 40080328›Full record

ArticleHuman nature (Hawthorne, N.Y.)2025

Is it a Match? Yawn Contagion and Smile Mimicry in Toddlers.

Ivan Norscia, Marta Caselli, Chiara Scianna, Sara Morone, Martina Brescini, Giada Cordoni

Abstract read
In one paragraph

Article in Human nature (Hawthorne, N.Y.), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing 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

5 citing papers in PubMed.

  1. Article
  2. 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
  3. Article
  4. Article
  5. Review
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

6 authors.

Ivan NorsciaDepartment of Life Sciences and Systems Biology, University of Torino (DBIOS), Via Accademia Albertina 13, 20123, Turin, Italy. ivan.norscia@unito.it.ORCID http://orcid.org/0000-0002-1618-7717
Marta CaselliDepartment of Life Sciences and Systems Biology, University of Torino (DBIOS), Via Accademia Albertina 13, 20123, Turin, Italy.ORCID http://orcid.org/0000-0001-8674-8236
Chiara SciannaDepartment of Life Sciences and Systems Biology, University of Torino (DBIOS), Via Accademia Albertina 13, 20123, Turin, Italy.
Sara MoroneDepartment of Life Sciences and Systems Biology, University of Torino (DBIOS), Via Accademia Albertina 13, 20123, Turin, Italy.
Martina BresciniDepartment of Life Sciences and Systems Biology, University of Torino (DBIOS), Via Accademia Albertina 13, 20123, Turin, Italy.
Giada CordoniDepartment of Life Sciences and Systems Biology, University of Torino (DBIOS), Via Accademia Albertina 13, 20123, Turin, Italy. giada.cordoni@unito.it.ORCID http://orcid.org/0000-0001-7093-0025

Funding

Fondazione Cassa di Risparmio Torino (CRT) 2020.1955Ministero dell'Università e della Ricerca PRIN_2022/CUP: D53C24004770006University of Torino - DBIOS NORI_RILO
6 · The paper itself

Abstract

Automatic behavioral matching includes Rapid Facial Mimicry (RFM) and Yawn Contagion (YC) that occur when the facial expression of an individual acts as a 'mirror social releaser' and induces the same facial expression in the observer (within 1 s for RFM, and minutes for YC). Motor replication has been linked to coordination and emotional contagion, a basic form of empathy. We investigated the presence and modulating factors of Rapid Smile Mimicry (RSM) and YC in infants/toddlers from 10 to 36 months at the nursery 'Melis' (Turin, Italy). In February-May 2022, we gathered audio and/or video of all occurrences data on affiliative behaviors, smiling during play, and yawning during everyday activities. Both RSM and YC were present, as toddlers were most likely to smile (within 1 s) or yawn (within three-min) after perceiving a smile/yawn from another toddler. Sex, age, and parents' country of origin did not influence RSM and YC occurrence, probably because gonadal maturation was long to come, the age range was skewed towards the early developmental phase, and toddlers had been in the same social group for months. RSM and YC showed social modulation, thus possibly implying more than just motor resonance. Both phenomena were inversely related to affiliation levels (a social bond proxy). Because literature reports that in adults RSM and YC may increase with familiarity, our reversed result suggests that in certain toddler cohorts the same phenomena may help increase socio-emotional coordination and that the function of motoric resonance may be experience- and context-dependent.

Indexed as

Facial ExpressionImitative BehaviorInfant BehaviorSmilingYawningChild, PreschoolFemaleHumansInfantMaleBehavioral matchingEmotional contagionEmotion ontogenyEmpathyFacial mimicryMotor resonance

Identifiers

PMID40080328
PMCPMC12058824

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

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.