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Choices behind the veil of ignorance in Formosan macaques

An ongoing debate regarding the evolution of morality is whether other species show precursory moral behavior. The veil of ignorance (VOI) paradigm is often used to elicit human moral judgment but has never been tested in other primates. We study the division of resources behind the VOI in Formosan...

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Detalles Bibliográficos
Autores principales: Lu, Yi-Ta, Hwang, Wei-Hsiang, Hsieh, Yi-Tsung, Ho, Tsung-Yu, Da Zhu, Jian-, Yeh, Chun-I, Huang, Chen-Ying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9802069/
https://www.ncbi.nlm.nih.gov/pubmed/36714857
http://dx.doi.org/10.1093/pnasnexus/pgac188
Descripción
Sumario:An ongoing debate regarding the evolution of morality is whether other species show precursory moral behavior. The veil of ignorance (VOI) paradigm is often used to elicit human moral judgment but has never been tested in other primates. We study the division of resources behind the VOI in Formosan macaques. Monkeys choose the equal division more often when a conspecific is present than when it is absent, suggesting a degree of impartiality. To better understand this impartiality, we measure a monkey’s reactions to two directions of inequity: one regarding inequity to its advantage and the other to its disadvantage. We find that disadvantageous inequity aversion correlates with the degree of impartiality behind the VOI. Therefore, seemingly impartial behavior could result from a primitive negative reaction to being disadvantaged. This suggests a mechanism to explain a tendency toward impartiality.