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Related Experiment Videos

Relative pitch perception in Japanese monkeys (Macaca fuscata).

A Izumi1

  • 1Department of Behavioral and Brain Sciences, Kyoto University, Inuyama, Aichi, Japan. aizumi@pri.kyoto-u.ac.jp

Journal of Comparative Psychology (Washington, D.C. : 1983)
|July 19, 2001
PubMed
Summary

Japanese monkeys can perceive relative pitch, similar to birds. This study trained monkeys to recognize pitch changes in tone sequences, demonstrating their ability to discern relative pitch within trained frequency ranges.

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Area of Science:

  • Animal Cognition
  • Auditory Perception
  • Comparative Psychology

Background:

  • Understanding pitch perception in non-human animals is crucial for insights into auditory processing evolution.
  • Previous research has established pitch perception in various avian species.

Purpose of the Study:

  • To determine if Japanese monkeys (Macaca fuscata) can perceive relative pitch.
  • To investigate the role of relative pitch in auditory discrimination tasks in primates.

Main Methods:

  • Training three Japanese monkeys on a task involving 3-tone sequences with rising and falling pitch contours.
  • Utilizing serial presentation with transposition to emphasize relative pitch over absolute frequency.
  • Conducting probe tests with novel sequences to assess generalization.

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Main Results:

  • Monkeys successfully discriminated between rising and falling pitch contours.
  • Discrimination was based on relative pitch when sequence frequency ranges were within the training parameters.
  • Performance showed similarities to pitch perception abilities observed in birds.

Conclusions:

  • Japanese monkeys demonstrate the capacity for relative pitch perception.
  • This finding suggests conserved mechanisms for pitch processing across different vertebrate classes.
  • Relative pitch processing may be a more widespread cognitive ability than previously assumed in mammals.