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Area of Science:

  • Behavioral Ecology
  • Neuroscience
  • Primate Cognition

Background:

  • Rhesus macaques often exhibit risk-seeking behavior in computerized gambling tasks.
  • This contrasts with risk-averse tendencies observed in other species, potentially due to task artificiality.

Purpose of the Study:

  • To investigate whether rhesus macaques' risk preferences are innate or influenced by experimental design.
  • To assess risk attitudes in a more ecologically valid foraging task.

Main Methods:

  • Assessed risk attitudes of rhesus macaques in a naturalistic foraging task with four feeding stations.
  • Stations offered stochastically or non-stochastically depleting rewards.
  • Measured patch residence times to infer preference for safe versus risky options.

Main Results:

  • Macaques spent longer at safe feeding stations than risky ones, indicating risk aversion.
  • This preference was independent of a win-stay-lose-shift heuristic.
  • Risk preference reversed with increased environmental richness.

Conclusions:

  • Rhesus macaque risk attitudes are labile and context-dependent.
  • Ecological validity of experimental tasks significantly impacts the expression of risk preference in primates.