Abstract：
:Inequity aversion refers to an attempt to reduce a perceived discrepancy between one's own input and output ratio (i.e. ratio between work invested and rewards obtained) and that of others. It has been proposed that inequity aversion might also play a role in the decision-making process of other animals. One issue, however, is that while studies in comparative cognition define clear behavioural criteria for an inequity aversion effect in animals, studies conducted on humans rely on an implicit definition of the concept involving assumptions for which there is yet no experimental evidence. In particular, the basis of inequity aversion is assumed to be a social comparison process that is further motivated by fairness concerns. Based on the studies on non-human animals, we tested whether inequity aversion in adult humans will satisfy the behavioural criteria for these assumptions. Although humans showed a decrease in working for a lower-value reward when working alone (non-social effect), this effect was enhanced when a partner was present (social effect) suggesting that their inequity aversion might be based on a social comparison process. Additionally, our tests ruled out the possibility that selfish motives underlie the subjects' decisions, which raises the possibility that fairness concerns might have been the primary motive. Our results thus show that human behaviour satisfies two criteria imposed by the definition of inequity aversion. A similar pattern is shown in other species, suggesting that the same or similar processes might influence economic decision-making in both humans and non-human animals.
journal_name
Anim Cognjournal_title
Animal cognitionauthors
Ostojić L,Clayton NSdoi
10.1007/s10071-013-0610-6subject
Has Abstractpub_date
2013-09-01 00:00:00pages
765-72issue
5eissn
1435-9448issn
1435-9456journal_volume
16pub_type
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