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Related Experiment Videos

On loss aversion in capuchin monkeys.

Alan Silberberg1, Peter G Roma, Mary E Huntsberry

  • 1American University, Washington, DC 20016-8062, USA. asilber@american.edu

Journal of the Experimental Analysis of Behavior
|April 22, 2008
PubMed
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Monkeys and humans exhibit biases when faced with gambles. This study reinterprets previous findings, suggesting these biases stem from reinforcement delays rather than loss aversion in decision-making.

Area of Science:

  • Behavioral economics
  • Primate cognition

Background:

  • Previous research suggested monkeys exhibit human-like biases, such as loss aversion, when presented with gambles.
  • Chen, Lakshminarayanan, and Santos (2006) presented choice experiments indicating rational responses to economic shocks but biased responses to gambles.

Purpose of the Study:

  • To re-evaluate the interpretation of monkey and human responses to gambles.
  • To investigate whether observed biases are due to loss aversion or differences in the delay of reinforcement.

Main Methods:

  • Conducted three choice experiments involving both monkeys and humans.
  • Collected data consistent with Chen, Lakshminarayanan, and Santos (2006) but analyzed it under a different theoretical framework.

Main Results:

Related Experiment Videos

  • Results from the three experiments were consistent with a reinterpretation of prior data.
  • The observed choice patterns were explained by differences in the delay of reinforcement between choice alternatives.

Conclusions:

  • The study challenges the conclusion that monkeys display loss aversion.
  • Findings suggest that choice behavior in gambles can be attributed to the temporal aspects of reinforcement rather than inherent biases like loss aversion.