People infer communicative action through an expectation for efficient communication

Amanda Royka (), Annie Chen, Rosie Aboody, Tomas Huanca and Julian Jara-Ettinger ()
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Amanda Royka: Yale University
Annie Chen: Yale University
Rosie Aboody: Yale University
Tomas Huanca: Centro Boliviano de Desarrollo Socio-Integral
Julian Jara-Ettinger: Yale University

Nature Communications, 2022, vol. 13, issue 1, 1-13

Abstract: Abstract Humans often communicate using body movements like winks, waves, and nods. However, it is unclear how we identify when someone’s physical actions are communicative. Given people’s propensity to interpret each other’s behavior as aimed to produce changes in the world, we hypothesize that people expect communicative actions to efficiently reveal that they lack an external goal. Using computational models of goal inference, we predict that movements that are unlikely to be produced when acting towards the world and, in particular, repetitive ought to be seen as communicative. We find support for our account across a variety of paradigms, including graded acceptability tasks, forced-choice tasks, indirect prompts, and open-ended explanation tasks, in both market-integrated and non-market-integrated communities. Our work shows that the recognition of communicative action is grounded in an inferential process that stems from fundamental computations shared across different forms of action interpretation.

Date: 2022
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DOI: 10.1038/s41467-022-31716-3

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