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A multi-lab test of the facial feedback hypothesisby the Many Smiles Collaboration

Lookup NU author(s): Dr Daniel EavesORCiD



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Springer Nature, 2022.

For re-use rights please refer to the publisher's terms and conditions.


The facial feedback hypothesis suggests that an individual’s subjective experience of emotion is influenced by their own facial expressions. However, researchers currently face conflicting narratives about whether this hypothesis is valid. A large collaborative effort consistently failed to replicate a seminal demonstration of the facial feedback hypothesis, but meta-analysis suggests the effects are real. Consequently, we conducted a foundational test of the facial feedback hypothesis, wherein a large group of researchers specified the best way(s) to test the hypothesis and used this information to design and execute an international multi-lab experiment. Two pilot studies suggested that smiling could both magnify ongoing feelings of happiness and initiate feelings of happiness in otherwise non-emotional scenarios. Next, 18 labs from 17 countries will examine whether these findings can be replicated.

Publication metadata

Author(s): Coles NA, March DS, Marmolejo-Ramos F, Banaruee H, Butcher N, Cavallet M, Dagaev N, Eaves DL, Foroni F, Gorbunova E, Gygax P, Poveda JAH, Ikeda AA, Kathin-Zadeh O, Ozdogru AA, Parzuchowski M, Ruiz-Fernández S, Som B, Suarez I, Trujillo N, Trujillo S, van der Zee T, Villalba-García C, Willis M, Yamada Y, Ellsworth P, Gaertner L, Strack F, Tullio Liuzza M, Marozzi M

Publication type: Article

Publication status: Published

Journal: Nature Human Behaviour

Year: 2022

Volume: 6

Pages: 1731-1742

Print publication date: 01/12/2022

Online publication date: 20/10/2022

Acceptance date: 07/09/2022

Date deposited: 04/11/2021

ISSN (electronic): 2397-3374

Publisher: Springer Nature


DOI: 10.1038/s41562-022-01458-9

ePrints DOI: 10.57711/3pnf-0d34


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