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Related Experiment Video

Updated: Jun 17, 2026

Targeted Training of Ultrasonic Vocalizations in Aged and Parkinsonian Rats
11:00

Targeted Training of Ultrasonic Vocalizations in Aged and Parkinsonian Rats

Published on: August 8, 2011

Attention to elders' voice in non-human primates.

Alban Lemasson1, Enora Gandon, Martine Hausberger

  • 1Ethologie animale et humaine, EthoS, UMR6552-CNRS, Université de Rennes 1, Station Biologique, 35380 Paimpont, France. alban.lemasson@univ-rennes1.fr

Biology Letters
|January 8, 2010
PubMed
Summary

Attention to elders

Area of Science:

  • Primate Behavior
  • Evolutionary Anthropology
  • Bioacoustics

Background:

  • Human cultures show respect for elders' speech, suggesting a universal trait.
  • Limited research exists on whether animals prioritize vocalizations from older individuals.

Purpose of the Study:

  • To investigate if non-human primates exhibit differential attention to vocalizations based on age.
  • To explore the potential biological underpinnings of age-based vocal attention.

Main Methods:

  • Analysis of hundreds of recorded vocal exchanges from Campbell's monkeys (Cercopithecus campbelli).
  • Comparison of vocalization frequency and response rates between younger and older adult female monkeys.

Main Results:

  • Aged female Campbell's monkeys were less vocal but elicited significantly more responses.

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  • Vocalizations from older female monkeys received greater attention from other individuals.

    • Conclusions:

    • Attention to elders' vocalizations is present in non-human primates, challenging purely cultural explanations.
    • Findings suggest biological bases for age-based vocal attention, impacting theories on language and culture evolution.