ArticlePublished on 25.10.2022

Multi-lab test of the facial feedback hypothesis

The PPSA research team (Pascal Gygax) has just published, in the prestigious journal Nature Human Behavior, along with 22 other laboratories in 19 countries, a "multi-lab test" on the famous pen-in-mouth psychology experiment. Teaser: the way you hold the pen in your mouth does not change your mood, but imitating a smiling person does.

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