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Articles 1 - 4 of 4
Full-Text Articles in Social and Behavioral Sciences
When Given The Opportunity, Chimpanzees Maximize Personal Gain Rather Than "Level The Playing Field", Lydia M. Hopper, Susan P. Lambeth, Steven J. Schapiro, Sarah F. Brosnan
When Given The Opportunity, Chimpanzees Maximize Personal Gain Rather Than "Level The Playing Field", Lydia M. Hopper, Susan P. Lambeth, Steven J. Schapiro, Sarah F. Brosnan
Psychology Faculty Publications
We provided chimpanzees (Pan troglodytes) with the ability to improve the quality of food rewards they received in a dyadic test of inequity.We were interested to see if this provision influenced their responses and, if so, whether it was mediated by a social partner’s outcomes. We tested eight dyads using an exchange paradigm in which, depending on the condition, the chimpanzees were rewarded with either high-value (a grape) or low-value (a piece of celery) food rewards for each completed exchange. We included four conditions. In the first, “Different” condition, the subject received different, less-preferred, rewards than their partner for each …
The Ontogeny Of Social Comparisons By Rhesus Macaques (Macaca Mulatta), Lydia M. Hopper, Susan P. Lambeth, Bruce J. Bernacky, Sarah F. Brosnan
The Ontogeny Of Social Comparisons By Rhesus Macaques (Macaca Mulatta), Lydia M. Hopper, Susan P. Lambeth, Bruce J. Bernacky, Sarah F. Brosnan
Psychology Faculty Publications
This longitudinal study investigated the development of social contrast-negative responses to inequitable rewards-in rhesus macaques (Macaca mulatta). Although responses to inequity by humans appear universal, this is something that develops with age. Infants first recognize inequity when around 18 months old and respond to it only when they are around 3 years old. To date, however, there have been no studies of the ontogeny of the inequity response in any species other than humans. To address this, we used an exchange paradigm, in which 10 pairs of rhesus monkeys had to exchange inedible tokens with the experimenter to …
When Given The Opportunity, Chimpanzees Maximize Personal Gain Rather Than “Level The Playing Field”, Lydia M. Hopper, Susan P. Lambeth, Steven J. Schapiro, Sarah F. Brosnan
When Given The Opportunity, Chimpanzees Maximize Personal Gain Rather Than “Level The Playing Field”, Lydia M. Hopper, Susan P. Lambeth, Steven J. Schapiro, Sarah F. Brosnan
Psychology Faculty Publications
We provided chimpanzees (Pan troglodytes) with the ability to improve the quality of food rewards they received in a dyadic test of inequity.We were interested to see if this provision influenced their responses and, if so, whether it was mediated by a social partner’s outcomes. We tested eight dyads using an exchange paradigm in which, depending on the condition, the chimpanzees were rewarded with either high-value (a grape) or low-value (a piece of celery) food rewards for each completed exchange. We included four conditions. In the first, “Different” condition, the subject received different, less-preferred, rewards than their partner …
The Importance Of Risk Tolerance And Knowledge When Considering The Evolution Of Inequity Responses Across The Primates, Gregory Deangelo, Sarah F. Brosnan
The Importance Of Risk Tolerance And Knowledge When Considering The Evolution Of Inequity Responses Across The Primates, Gregory Deangelo, Sarah F. Brosnan
Psychology Faculty Publications
Researchers studying human and non-human primates have begun exploring deviations from the canonical model of expected utility. Additionally, researchers have examined the role of inequality in decision-making across the taxa. However, these two research programs are rarely combined. In this paper we offer an examination of the role and impact of risk and inequity on decision-making in both human and non-human primates. We also offer insights into what drives these observed differences, considering a range of explanations from biological to methodological.