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Related Experiment Video

Updated: Jul 18, 2025

Author Spotlight: Deciphering the Cognitive and Neural Mechanisms of Gesture in Communication

Author Spotlight: Deciphering the Cognitive and Neural Mechanisms of Gesture in Communication

Published on: January 26, 2024

Visual Form and Event Semantics Predict Transitivity in Silent Gestures: Evidence for Compositionality.

Chuck Bradley¹, Ronnie Wilbur^1,2

¹Department of Linguistics, Purdue University.

Cognitive Science

|August 28, 2023

Summary

Silent gestures show linguistic structure, challenging previous beliefs. Untrained individuals systematically alter hand movements to convey event types, demonstrating a form-meaning correspondence.

Keywords:

Argument structure Compositionality Event semantics Language emergence Sign language Silent gesture

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Area of Science:

Cognitive Science
Linguistics
Psychology

Background:

Silent gestures are often considered non-linguistic and holistic.
Previous research suggested a lack of compositional structure in silent gestures.
Emerging evidence indicates systematicity and form-meaning correspondences in gesture.

Purpose of the Study:

To investigate whether untrained gesturers systematically manipulate gesture form to represent transitive and intransitive events.
To challenge the holistic interpretation of silent gesture.
To identify potential subunits within silent gestures that contribute to meaning.

Main Methods:

Elicited silent gestures from untrained participants representing different event types.
Annotated gestures for manual features relevant to transitivity distinctions.
Trained machine learning models (support vector machines) to predict event transitivity from gesture features.

Main Results:

Machine learning models achieved good prediction accuracy for transitivity based on gesture features.
Demonstrated systematic manipulation of gesture form corresponding to event transitivity.
Identified specific handshape features contributing to the coding of transitivity.

Conclusions:

Silent gestures exhibit systematicity and form-meaning correspondences, akin to linguistic systems.
Handshape features in gestures may be co-opted from cognitive systems for communication.
The strategy of mapping event participants to each hand suggests a cognitive basis for gesture, potentially influencing emerging sign languages.