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Related Experiment Videos

Chimpanzees deceive a human competitor by hiding.

Brian Hare1, Josep Call, Michael Tomasello

  • 1Department of Anthropology, Harvard University, Cambridge, MA 02138, USA. hare@eva.mpg.de

Cognition
|January 18, 2006
PubMed
Summary
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Chimpanzees actively conceal food from humans by using hidden routes, demonstrating advanced deception skills. This research highlights their cognitive abilities in social competition and visual perspective-taking.

Area of Science:

  • Primate cognition
  • Animal behavior
  • Evolutionary psychology

Background:

  • Limited evidence exists for non-human species purposefully manipulating others' psychological states deceptively.
  • Understanding deception in non-human primates is crucial for insights into the evolution of social cognition.

Purpose of the Study:

  • To investigate whether chimpanzees purposefully attempt to conceal actions from human competitors.
  • To determine if chimpanzees can manipulate others' visual access to their own advantage.

Main Methods:

  • Eight chimpanzees participated in three novel competitive tests against a human.
  • Chimpanzees' approach routes to a contested food item were observed.
  • The visibility of the chimpanzees' approach to the human competitor was analyzed.

Related Experiment Videos

Main Results:

  • Chimpanzees consistently chose routes hidden from the human's view to access food.
  • Some chimpanzees used circuitous paths to maintain concealment.
  • This behavior was observed from the chimpanzees' first trials.

Conclusions:

  • Chimpanzees demonstrate the ability to actively conceal their actions from others.
  • These findings support that chimpanzees understand what others can and cannot see.
  • Chimpanzees skillfully manipulate visual access for competitive advantage, indicating advanced deceptive capabilities.