Can chimpanzees (Pan troglodytes) discriminate appearance from reality?

  title={Can chimpanzees (Pan troglodytes) discriminate appearance from reality?},
  author={C. Krachun and J. Call and M. Tomasello},
  • C. Krachun, J. Call, M. Tomasello
  • Published 2009
  • Psychology, Medicine
  • Cognition
  • A milestone in human development is coming to recognize that how something looks is not necessarily how it is. We tested appearance-reality understanding in chimpanzees (Pan troglodytes) with a task requiring them to choose between a small grape and a big grape. The apparent relative size of the grapes was reversed using magnifying and minimizing lenses so that the truly bigger grape appeared to be the smaller one. Our Lens test involved a basic component adapted from standard procedures for… CONTINUE READING
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