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Eye Movements Decrease during Effortful Speech Listening.

M Eric Cui^1,2, Björn Herrmann^3,2

¹Rotman Research Institute, Baycrest Academy for Research and Education, North York, Ontario M6A 2E1, Canada.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience

|July 25, 2023

Summary

This summary is machine-generated.

Eye movements can help detect hearing loss earlier by measuring listening effort. This study shows that eye movements decrease when speech comprehension becomes difficult, offering a new diagnostic approach.

Keywords:

eye movements eye-tracking listening effort pupillometry speech processing spoken stories

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Eye-tracking to Distinguish Comprehension-based and Oculomotor-based Regressive Eye Movements During Reading

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Area of Science:

Auditory Neuroscience
Cognitive Psychology
Ophthalmology

Background:

Hearing impairment is common in older adults and often diagnosed late.
Assessing listening effort may enable earlier diagnosis of hearing loss.
Current methods like pupillometry have practical limitations.

Purpose of the Study:

To explore eye movements as a novel method for assessing listening effort.
To test the hypothesis that eye movements decrease with increased listening difficulty.

Main Methods:

Three experiments were conducted with human participants.
Eye movements (fixation duration, gaze dispersion) were recorded during speech listening under varying levels of masking.
Pupillometry was used as a comparative measure.

Main Results:

Fixation duration increased and spatial gaze dispersion decreased as speech masking intensified.
Reduced eye movements correlated with increased listening effort across different visual tasks and speech materials.
Pupillometry showed lower sensitivity to speech masking in naturalistic listening scenarios.

Conclusions:

Eye movements provide a sensitive indicator of listening effort and cognitive load.
Changes in eye movements during effortful listening suggest modulation of neural activity in eye movement regulatory brain regions.
Eye movement analysis offers a promising, practical alternative for early hearing impairment diagnosis.