The social significance of subtle signals

Rebecca Bliege Bird (), Elspeth Ready and Eleanor A. Power
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Rebecca Bliege Bird: Pennsylvania State University
Elspeth Ready: University of Nebraska-Lincoln
Eleanor A. Power: London School of Economics and Political Science

Nature Human Behaviour, 2018, vol. 2, issue 7, 452-457

Abstract: Abstract Acts of prosociality, such as donating to charity, are often analysed in a similar way to acts of conspicuous advertising; both involve costly signals revealing hidden qualities that increase the signaller’s prestige. However, experimental work suggests that grand gestures, even if prosocial, may damage one’s reputation for trustworthiness and cooperativeness if they are perceived as prestige enhancing: individuals may gain some types of cooperative benefits only when they perform prosocial acts in particular ways. Here, we contrast subtle, less obviously costly, interpersonal forms of prosocial behaviour with high-cost displays to a large audience, drawing on the example of food sharing in subsistence economies. This contrast highlights how highly visible prosocial displays may be effective for attracting new partners, while subtle signals may be crucial for ensuring trust and commitment with long-term partners. Subtle dyadic signals may be key to understanding the long-term maintenance of interpersonal networks that function to reduce unanticipated risks.

Date: 2018
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DOI: 10.1038/s41562-018-0298-3

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