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Testing differential use of payoff-biased social learning strategies in children and chimpanzees.

Vale, Gillian and Flynn, Emma G. and Kendal, Jeremy R. and Rawlings, Bruce and Hopper, Lydia M. and Schapiro, Steven J. and Lambeth, Susan P. and Kendal, Rachel L. (2017) 'Testing differential use of payoff-biased social learning strategies in children and chimpanzees.', Proceedings of the Royal Society B., 284 (1868). p. 20171751.

Abstract

Various non-human animal species have been shown to exhibit behavioural traditions. Importantly, this research has been guided by what we know of human culture, and the question of whether animal cultures may be homologous or analogous to our own culture. In this paper, we assess whether models of human cultural transmission are relevant to understanding biological fundamentals by investigating whether accounts of human payoff-biased social learning are relevant to chimpanzees (Pan troglodytes). We submitted 4- and 5-year-old children (N = 90) and captive chimpanzees (N = 69) to a token–reward exchange task. The results revealed different forms of payoff-biased learning across species and contexts. Specifically, following personal and social exposure to different tokens, children's exchange behaviour was consistent with proportional imitation, where choice is affected by both prior personally acquired and socially demonstrated token–reward information. However, when the socially derived information regarding token value was novel, children's behaviour was consistent with proportional observation; paying attention to socially derived information and ignoring their prior personal experience. By contrast, chimpanzees' token choice was governed by their own prior experience only, with no effect of social demonstration on token choice, conforming to proportional reservation. We also find evidence for individual- and group-level differences in behaviour in both species. Despite the difference in payoff strategies used, both chimpanzees and children adopted beneficial traits when available. However, the strategies of the children are expected to be the most beneficial in promoting flexible behaviour by enabling existing behaviours to be updated or replaced with new and often superior ones.

Item Type:Article
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1098/rspb.2017.1751
Publisher statement:© 2017 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Date accepted:20 October 2017
Date deposited:31 October 2017
Date of first online publication:29 November 2017
Date first made open access:04 December 2017

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