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Related Experiment Video

Updated: Jun 14, 2025

Author Spotlight: Investigating Vocal Information Representation in Small Primates and Its Alteration by Psychiatric Disorders Using Noninvasive EEG

Author Spotlight: Investigating Vocal Information Representation in Small Primates and Its Alteration by Psychiatric Disorders Using Noninvasive EEG

Published on: July 26, 2024

Active sampling as an information seeking strategy in primate vocal interactions.

Thiago T Varella¹, Daniel Y Takahashi², Asif A Ghazanfar³

¹Princeton Neuroscience Institute & Department of Psychology, Princeton University, Princeton, NJ, 08544, USA.

Communications Biology

|September 6, 2024

Summary

Marmoset monkeys use vocalizations not just to communicate, but as an active sensing strategy to gather social information. This research reveals how their real-time vocal exchanges function as an information-seeking mechanism.

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Last Updated: Jun 14, 2025

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Area of Science:

Ethology
Animal Communication
Behavioral Ecology

Background:

Active sensing is crucial for environmental exploration.
Vocal behaviors in social animals may serve functions beyond simple communication.

Purpose of the Study:

To investigate if contact vocalizations in marmoset monkeys function as an active sensing mechanism.
To compare active sampling models with vocal accommodation frameworks in primate vocal interactions.

Main Methods:

Analysis of real-time vocal interactions in marmoset monkeys.
Simulations comparing active sampling and vocal accommodation policies.
Comparison of simulation outputs with empirical vocal interaction data.

Main Results:

Active sampling provides a better model for real-time marmoset vocal exchanges than vocal accommodation.
The active sampling model could partially predict optimal call durations.
Primate vocal interactions may serve as a non-traditional information-seeking strategy.

Conclusions:

Marmoset vocalizations are used for active sensing of the social environment.
Vocal interactions facilitate information gathering about conspecifics.
This study proposes a novel function for primate vocalizations in social information seeking.