Do capuchin monkeys (Cebus apella) diagnose causal relations in the absence of a direct reward?

Brian J. Edwards, Benjamin M. Rottman, Maya Shankar, Riana Betzler, Vladimir Chituc, Ricardo Rodriguez, Liara Silva, Leah Wibecan, Jane Widness, Laurie R. Santos

Research output: Contribution to journalArticle

Abstract

We adapted a method from developmental psychology [1] to explore whether capuchin monkeys (Cebus apella) would place objects on a "blicket detector" machine to diagnose causal relations in the absence of a direct reward. Across five experiments, monkeys could place different objects on the machine and obtain evidence about the objects' causal properties based on whether each object "activated" the machine. In Experiments 1-3, monkeys received both audiovisual cues and a food reward whenever the machine activated. In these experiments, monkeys spontaneously placed objects on the machine and succeeded at discriminating various patterns of statistical evidence. In Experiments 4 and 5, we modified the procedure so that in the learning trials, monkeys received the audiovisual cues when the machine activated, but did not receive a food reward. In these experiments, monkeys failed to test novel objects in the absence of an immediate food reward, even when doing so could provide critical information about how to obtain a reward in future test trials in which the food reward delivery device was reattached. The present studies suggest that the gap between human and animal causal cognition may be in part a gap of motivation. Specifically, we propose that monkey causal learning is motivated by the desire to obtain a direct reward, and that unlike humans, monkeys do not engage in learning for learning's sake.

Original languageEnglish (US)
Article numbere88595
JournalPLoS One
Volume9
Issue number2
DOIs
StatePublished - Feb 19 2014
Externally publishedYes

Fingerprint

Cebus
Reward
Haplorhini
monkeys
learning
Learning
audiovisuals
Experiments
Food
Cues
sake
Animals
psychology
cognition
Detectors
Cognition
detectors
Motivation
testing
Equipment and Supplies

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Edwards, B. J., Rottman, B. M., Shankar, M., Betzler, R., Chituc, V., Rodriguez, R., ... Santos, L. R. (2014). Do capuchin monkeys (Cebus apella) diagnose causal relations in the absence of a direct reward? PLoS One, 9(2), [e88595]. https://doi.org/10.1371/journal.pone.0088595

Do capuchin monkeys (Cebus apella) diagnose causal relations in the absence of a direct reward? / Edwards, Brian J.; Rottman, Benjamin M.; Shankar, Maya; Betzler, Riana; Chituc, Vladimir; Rodriguez, Ricardo; Silva, Liara; Wibecan, Leah; Widness, Jane; Santos, Laurie R.

In: PLoS One, Vol. 9, No. 2, e88595, 19.02.2014.

Research output: Contribution to journalArticle

Edwards, BJ, Rottman, BM, Shankar, M, Betzler, R, Chituc, V, Rodriguez, R, Silva, L, Wibecan, L, Widness, J & Santos, LR 2014, 'Do capuchin monkeys (Cebus apella) diagnose causal relations in the absence of a direct reward?', PLoS One, vol. 9, no. 2, e88595. https://doi.org/10.1371/journal.pone.0088595
Edwards BJ, Rottman BM, Shankar M, Betzler R, Chituc V, Rodriguez R et al. Do capuchin monkeys (Cebus apella) diagnose causal relations in the absence of a direct reward? PLoS One. 2014 Feb 19;9(2). e88595. https://doi.org/10.1371/journal.pone.0088595
Edwards, Brian J. ; Rottman, Benjamin M. ; Shankar, Maya ; Betzler, Riana ; Chituc, Vladimir ; Rodriguez, Ricardo ; Silva, Liara ; Wibecan, Leah ; Widness, Jane ; Santos, Laurie R. / Do capuchin monkeys (Cebus apella) diagnose causal relations in the absence of a direct reward?. In: PLoS One. 2014 ; Vol. 9, No. 2.
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