Abstract
While economic standard theory explains cooperation in terms of rational decision-making, empirical studies suggest that humans have social preferences for cooperating with others. We investigated the specificity of these social preferences for interactions with human, relative to non-human, agents in a prisoner’s dilemma game. To obtain insights into emotional processes during cooperation, we measured activity of the corrugator supercilii muscle as indicator of spontaneous emotional responding during cooperation. After unreciprocated defection (free-riding), participants switched more often to a cooperative strategy and showed increased corrugator activity (suggesting more negative emotional responses) when playing with a human relative to a computer. This suggests that humans have a specific preference for cooperating with other humans and that cooperation may be promoted by unpleasant affect in response to the outcome of one’s own “free-riding”.
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We are grateful to Nadja Wiebe, Angelique Zessin, and Antonia Papadakis for help with data collection.
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All procedures performed in this study were in accordance with the ethical standards of the institutional research committee and with the declaration of Helsinki and its later amendments.
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Soutschek, A., Weinreich, A. & Schubert, T. Facial electromyography reveals dissociable affective responses in social and non-social cooperation. Motiv Emot 42, 118–125 (2018). https://doi.org/10.1007/s11031-017-9662-2
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DOI: https://doi.org/10.1007/s11031-017-9662-2