NDLI: Capuchins (Cebus apella) fail to show an asymmetric dominance effect

Content Provider	Springer Nature Link
Author	Cohen, Paul M. Santos, Laurie R.
Copyright Year	2016
Abstract	The asymmetric dominance effect (ADE) occurs when the introduction of a partially dominated decoy option increases the choice share of its dominating alternative. The ADE is a violation of regularity and the constant-ratio rule, which are two derivations of the independence of irrelevant alternatives axiom, a core tenant of rational choice. The ADE is one of the most widely reported human choice phenomena, leading researchers to probe its origins by studying a variety of non-human species. We examined the ADE in brown capuchin monkeys (Cebus apella), a species that displays many other decision biases. In Experiment 1, we used a touchscreen method to elicit choice-based preferences for food rewards in asymmetrically dominated choice sets. In Experiments 2 and 3, we distinguished between different types of judgments and used a free selection task to elicit consumption-based preferences for juice rewards. However, we found no evidence for the ADE through violations of regularity or the constant-ratio rule, despite the similarity of our stimuli to other human and non-human experiments. While these results appear to conflict with existing literature on the ADE in non-human species, we point out methodological differences—notably, the distinction between value-based and perception-based stimuli—that have led to a collection of phenomena that are difficult to understand under a unitary theoretical framework. In particular, we highlight key differences between the human and non-human research and provide a series of steps that researchers could take to better understand the ADE.
Starting Page	331
Ending Page	345
Page Count	15
File Format	PDF
ISSN	14359448
Journal	Animal Cognition
Volume Number	20
Issue Number	2
e-ISSN	14359456
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-11-16
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Asymmetric dominance effect Decoy effect Capuchin monkeys Choice biases Behavioral Sciences Zoology Psychology Research
Content Type	Text
Resource Type	Article
Subject	Experimental and Cognitive Psychology Ecology, Evolution, Behavior and Systematics

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