Honest smiles as a costly signal in social exchange (Commentary).

Centorrino, Samuele; Djemai, Elodie; Hopfensitz, Astrid; Milinski, Manfred; Seabright, Paul

doi:10.1017/S0140525X10001287

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Honest smiles as a costly signal in social exchange (Commentary).

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Milinski, Manfred
Department Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Citation

Centorrino, S., Djemai, E., Hopfensitz, A., Milinski, M., & Seabright, P. (2010). Honest smiles as a costly signal in social exchange (Commentary). Behavioral and Brain Sciences, 33(6), 439-439. doi:10.1017/S0140525X10001287.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-D53F-C

Abstract

Smiling can be interpreted as a costly signal of future benefits from cooperation between the individual smiling and the individual to whom the smile is directed. The target article by Niedenthal et al. gives little attention to the possible mechanisms by which smiling may have evolved. In our view, there are strong reasons to think that smiling has the key characteristics of a costly signal.