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Related Experiment Video

Updated: Apr 11, 2026

A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions

A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions

Published on: July 16, 2015

Acoustic Salience Drives Pupillary Dynamics in an Interrupted, Reverberant Task.

Victoria Figarola¹, Wusheng Liang², Sahil Luthra³

¹Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States.

Biorxiv : the Preprint Server for Biology

|April 10, 2026

Summary

This summary is machine-generated.

Reverberation and interruptions challenge selective attention, impacting recall and pupil dilation. Stimulus salience, not task performance, more strongly influences cognitive load in noisy listening environments.

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Area of Science:

Auditory Neuroscience
Cognitive Psychology
Acoustics

Background:

Maintaining selective attention in real-world listening is difficult due to reverberation and interruptions.
The impact of these acoustic challenges on selective attention and cognitive load is not well understood.

Purpose of the Study:

To investigate how reverberation and sudden interruptions affect selective attention and cognitive load.
To examine the relationship between behavioral performance (syllable recall) and physiological responses (pupil dilation).

Main Methods:

A spatial selective attention task with two competing syllable streams was used.
Stimuli were presented in pseudo-anechoic or reverberant conditions, with random interruptions.
Syllable recall accuracy and pupil dilation were measured.

Main Results:

Reverberation impaired overall performance and disrupted attention, especially with interruptions.
Reverberation reduced peak pupil dilation in uninterrupted trials, indicating reduced scene clarity.
Pupil dilations to interruptions showed strong perceptual salience, unaffected by room conditions or trial sequencing.

Conclusions:

Reverberation degrades auditory scene clarity and affects selective attention.
Stimulus salience, particularly from unexpected interruptions, strongly drives cognitive load.
Cognitive load is more influenced by the salience of auditory events than by task performance metrics alone.