Context-effect bias in capuchin monkeys (Sapajus spp.): exploring decoy influences in a value-based food choice task.

ABSTRACT: Decision making is known to be liable to several context effects. In particular, adding a seemingly irrelevant alternative (decoy) to a set of options can modify preferences: typically, by increasing choices towards whatever option clearly dominates the decoy (attraction effect), but occasionally also decreasing its appeal and generating a shift in the opposite direction (repulsion effect). Both types of decoy effects violate rational choice theory axioms and suggest dynamic processes of preference-formation, in which the value of each alternative is not determined a priori, but it is instead constructed by comparing options during the decision process. These effects are well documented, both in humans and in other species: e.g., amoebas, ants, honeybees, frogs, birds, cats, dogs. However,

SUBMITTER: Marini M 

PROVIDER: S-EPMC9950244 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature