Cited by 134Experimental Behavioral Economics StudiesEvolutionary Game Theory and CooperationPrimate Behavior and Ecology

A hypothesis of the co-evolution of cooperation and responses to inequity

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Brosnan, Sarah F.·2011·Frontiers in Neuroscience

Abstract

Recent evidence demonstrates that humans are not the only species to respond negatively to inequitable outcomes which are to their disadvantage. Several species respond negatively if they subsequently receive a less good reward than a social partner for completing the same task. While these studies suggest that the negative response to inequity is not a uniquely human behavior, they do not provide a functional explanation for the emergence of these responses due to similar characteristics among these species. However, emerging data support the hypothesis that an aversion to inequity is a mechanism to promote successful long-term cooperative relationships amongst non-kin. In this paper, I discuss several converging lines of evidence which illustrate the need to further evaluate this relationship. First, cooperation can survive modest inequity; in explicitly cooperative interactions, individuals are willing to continue to cooperate despite inequitable outcomes as long as the partner's overall behavior is equitable. Second, the context of inequity affects reactions to it in ways which support the idea that joint efforts lead to an expectation of joint payoffs. Finally, comparative studies indicate a link between the degree and extent of cooperation between unrelated individuals in a species and that species' response to inequitable outcomes. This latter line of evidence indicates that this behavior evolved in conjunction with cooperation and may represent an adaptation to increase the payoffs associated with cooperative interactions. Together these data inform a testable working hypothesis for understanding decision-making in the context of inequity and provide a new, comparative framework for evaluating decision-making behavior.

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  • This lack of inequity aversion in callitrichids suggests either an inability to recognize and/or respond to resource inequities, or that maintaining biparental cooperation may confer a greater benefit to the family group than losing a parental partner due to the avoidance of interactions that lead to minor inequities.

    “This lack of inequity aversion in callitrichids suggests there is either an inability to recognize and/or respond to resource inequities, or that maintaining biparental cooperation may confer a greater benefit to the family group, (e.g., enhanced offspring survival), than losing a parental partner due to the avoidance of interactions that lead to minor inequities (Brosnan, 2011).”
  • The patterns of prosocial preferences among primates vary considerably both across species and within species.

    “The patterns of prosocial preferences among primates vary considerably both across species and within species (Brosnan, 2011; Brosnan and de Waal, 2014; Cronin, 2012; McAuliffe and Thornton, 2015).”

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  1. Fruth B. Hohmann G. (2002). “How bonobos handle hunts and harvests: food sharing,” in Behavioural Diversity in Chimpanzees and Bonobos, eds Boesch C. Hohmann G. Marchant L. F. (Cambridge: Cambridge University Press), 231– 243
  2. van Schaik C. P. van Hooff J. A. R. A. M. (1996). “Towards an understanding of the orangutan's social system,” in Great Ape Societies, eds McGrew W. C. Marchant L. F. Nishida T. (Cambridge: Cambridge University Press), 3– 15

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Authors
Brosnan, S. F.
Affiliations
Georgia State University (US)
Corresponding author
Brosnan, Sarah F.
Venue
Frontiers in Neuroscience
Published
2011
Volume
5
Pages
43-43
ISSN
  • 1662-453X (ISSN-L)
  • 1662-4548
OpenAlex
W1964756643
Cited by
134
References
113
Citations by year
2026: 5 · 2025: 5 · 2024: 11 · 2023: 12 · 2022: 9 · 2021: 10 · 2020: 3 · 2019: 9 · 2018: 3 · 2017: 9 · 2016: 10 · 2015: 12 · 2014: 12 · 2013: 10 · 2012: 10
FWCI
29.58
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Science Foundation
Topics
  • Social Sciences › Safety Research › Experimental Behavioral Economics Studies
  • Social Sciences › Sociology and Political Science › Evolutionary Game Theory and Cooperation
  • Social Sciences › Psychology › Social Psychology › Primate Behavior and Ecology
Keywords
inequity aversion, cooperation, coevolution, comparative psychology, non-kin cooperation, joint effort, evolutionary psychology, decision-making

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