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What young chimpanzees know about seeing

D J Povinelli1, T J Eddy

  • 1Laboratory of Comparative Behavioral Biology, University of Southwestern Louisiana-New Iberia Research Center 70560, USA.

Monographs of the Society for Research in Child Development
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

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Young chimpanzees track gaze and learn visual rules but do not appear to understand seeing as a subjective mental event. This suggests a potential difference in visual perception understanding compared to humans.

Area of Science:

  • Cognitive Science
  • Comparative Psychology
  • Primate Behavior

Background:

  • Previous research suggests chimpanzees may grasp epistemological aspects of visual perception, but findings are ambiguous.
  • Understanding seeing as a subjective mental event anchoring organisms to the world is debated in non-human primates.

Purpose of the Study:

  • To determine if young chimpanzees appreciate that visual perception subjectively links organisms to the external world.
  • To explore chimpanzee and preschool children's knowledge about visual perception through 15 studies.

Main Methods:

  • Employed a large sample of well-trained chimpanzees (6-7 per study) with narrow age ranges.
  • Designed studies to differentiate between theory of mind predictions and learning theory explanations.
  • Validated nonverbal methods by comparing chimpanzee performance with preschool children's known developmental transitions in understanding visual perception.

Related Experiment Videos

Main Results:

  • Young chimpanzees develop algorithms for tracking visual gaze and learn rules about facial configurations and subsequent events.
  • Findings provide little evidence that these learned behaviors are grounded in intentionality or a mentalistic appreciation of seeing.
  • Chimpanzees appear oblivious to the attentional significance of gaze, despite attending to and following it.

Conclusions:

  • Young chimpanzees learn rules about visual perception but do not necessarily understand seeing as being 'about' something.
  • Results are consistent with potential developmental delays in chimpanzees, alternative theories of attention, or the unique evolution of subjective visual perception in humans.
  • Further research with older chimpanzees may reveal a more advanced mentalistic appreciation of seeing.