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Auditory and vocal functions of the chimpanzee

Research Project

Project/Area Number 13410025
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 実験系心理学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

KOJOMA Shozo  Primate Research Institute Professor, 霊長類研究所, 教授 (70027499)

Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥10,400,000 (Direct Cost: ¥10,400,000)
Fiscal Year 2002: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2001: ¥7,900,000 (Direct Cost: ¥7,900,000)
Keywordschimpanzee / Auditory cognition / Vocalization / Individual recognition / Early vocal development / Mother-infant vocal interaction / 聴覚 / 聴覚-視覚見本あわせ / 聴覚短期記憶 / 音声言語理解 / 母子音声交換 / 異種感覚間統合 / 発声者同定
Research Abstract

In this research project, I found a chimpanzee (a female chimpanzee, Pan) can identify other individuals in her group only by their vocal sounds. Researchers found individuality in pant hoots, but not in pant grunts and screams. The present study showed that she can match not only pant hoots, but also pant grunts and screams with a photograph of group members in an auditory-visual intermodal matching to sample task. She can also identify each caller in duets of pant hoots. The importance of the fundamental frequency and frequency components below and above 1 kHz for individual recognition by vocal sounds was examined. It is found that the fundamental frequency is important for identification. Thus, researchers have underestimated the ability of the chimpanzee to identify vocalizers by vocal sounds. She matched different vocal sounds with with different facial actions in the same chimpanzee.
Early vocal development of a chimpanzee infant was studied and compared with that of a human-raised chimpanzee infant. Both infants showed a similar developmental pattern: they enhanced elicitability of vocal sounds at about 55 days of age. Vocal interactions of the three chimpanzee mother-infant pairs were examined. Vocal interactions were observed only in a pair (Pan-Pal). Other pairs did not show interactions. Pan received vocal operant training in early infancy. The mother responded to infant crying vocalization by pant grunt-like sounds.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Kojima, S.: "Experimental analyses of body image in the chimpanzee"Primates. (in press). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kojima, S., Izumi, A., Cengniet, M.: "Identification of vocalizers by pant hoots, pant grunts and screams in a chimpanzee"Primates. (in press). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kojima, S.: "A search for the origins of human speech"Kyoto Univ. Academic Press. 195 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kojima S.: "Experimental analyses of body image in the chimpanzee"Primates. in press. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kojima, S., Izumi A., Ceugniet, M.: "Identification of vocalizers by pant hoots, pant grunts and screams in a chimpanzee"Primates. in press. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kojima, S.: "A search for the origins of human speech: Auditory and vocal functions of the chimpanzee"Kyoto Univ. Academic Press. 195 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kojima, S.: "Experimental analyses of body image in the chimpanzee("Primates. (in press).

    • Related Report
      2002 Annual Research Report
  • [Publications] Kojima, S.: "Identification of vocalizers by pant hoots, pant grunts and screams in a chimpanzee"Primates. (in press).

    • Related Report
      2002 Annual Research Report
  • [Publications] Kojima, S.: "A search for the origins of human speech : Auditory and vocal functions of the chimpanzee"Kyoto Univ.Academic Press. 195 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hashiya, K., Kojima, S.: "Acquisition of auditory-visual intermodel matching-to-sampk by a chimpanzes (Pam troglodytes)"Animal Coguition. 4. 231-239 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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