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1992 Fiscal Year Final Research Report Summary

Comparative study of visual information processing in humans and chimpanzees.

Research Project

Project/Area Number 03610048
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Psychology
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

MATSUZAWA Tetsuro  Primate Research Institute Kyoto University, Professor, 霊長類研究所, 教授 (60111986)

Project Period (FY) 1991 – 1992
Keywordschimpanzee / pattern recognition / Kanji-characters / comparative cognition / information processing / Memory process / Short-term memory / Concept of number
Research Abstract

The present study aimed to cralify the similarity and difference between humans and chimpanzees in perceptual and cognitive processes. The topics were as follows.
NUMBER PERCEPTION : A chimpanzee named Ai, 16 years old female, learned to label the number of dots presented on a CRT screen and asked to choose a crresponding Arabic numeral on the other CRT screen.
She learned to label one through ten, and her accuracy of the performance reached to 85% correct when the numbers were presented randomly. It means that the chimpanzee showed a rudimental ability of processing the numbers.
MEMORY PROCESS : The chimpanzee also learned to remember the strings of numerals up to six. The task is so-called matching to sample. She can reproduce 6 numerals in a string, where she spontaneously developed her favorite order of reproducing the string from center to right then back to left. She also learned to 2 numerals and reproduce then after short period of delay interval.
PATTERN PERCEPTION OF KANJI : The chimpanzee learnd to do matching to sample of Kanji-characters. 40 Kanji characters were used as samples. She discriminated those 40 characters at about 80%

  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] Tomonaga,M.Matsuzawa,T: "Perception of complex qeometric figures in chimpanzees and humans:Analysis based on choice reaction time." Journal of Comparative Psychology.106. 43-52 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 松沢哲郎: "チンパンジーの「言語」" 臨床科学. 28. 731-737 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Matsuzawa,T.: "Constructio nfrom scratch:Isomorphism of symbol-use and tool-use in chimpanzees." Current,Directions Psycholoqical Science. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tomonaga, M.and Natsuzawa, T.: "Perception of complex geometric figures in chimpanzees and humans : Analysis based on choice reaction time" Journal of Comparative Psychology. 106(1). 43-52 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Matsuzawa, T.: "Construction from scratch : Isomorphism of symbol use and tool-use in chinpanzees" Current Directions in Psychological Science. (in press).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1995-03-27  

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