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Related Experiment Video

Updated: Feb 23, 2026

A Modified Mirror Test as a Visual Guide for the Self-awareness Trait in Wild Antarctica Penguins, Pygoscelis adeliae
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Chimpanzees recognize their own delayed self-image.

Satoshi Hirata1, Kohki Fuwa2, Masako Myowa3

  • 1Wildlife Research Center, Kyoto University, Kyoto, Kyoto 606-8203, Japan.

Royal Society Open Science
|September 8, 2017
PubMed
Summary
This summary is machine-generated.

Chimpanzees demonstrated self-recognition in delayed video, suggesting a concept of self extending across time. This finding in chimpanzees mirrors abilities seen in human children around four years old.

Keywords:
chimpanzeedelayed contingencyself-conceptself-recognition

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Area of Science:

  • Cognitive Ethology
  • Comparative Psychology
  • Primate Cognition

Background:

  • Self-recognition is a key indicator of self-awareness.
  • Mirror self-recognition is established in some animals, but temporal self-recognition is less understood in non-human species.
  • Human children develop temporal self-recognition around age four.

Purpose of the Study:

  • To investigate whether chimpanzees possess a concept of self that extends across time.
  • To assess chimpanzee ability to recognize themselves in delayed video footage.
  • To explore temporal dissociation in primate self-concept.

Main Methods:

  • A modified mark test was employed with chimpanzees.
  • Chimpanzees viewed live and delayed video images of themselves with facial marks.
  • Behavioral responses (mark removal) were recorded under different viewing conditions.

Main Results:

  • Three out of five chimpanzees consistently removed marks while viewing delayed video.
  • Mark removal was significantly less frequent in control video conditions.
  • Chimpanzees showed differential responding based on temporal congruence.

Conclusions:

  • Chimpanzees exhibit self-recognition in delayed video, indicating a temporal component to their self-concept.
  • This suggests chimpanzees, like older human children, can comprehend temporal dissociation.
  • The findings advance our understanding of self-awareness evolution in non-human animals.