Auditory attention switching with listening difficulty: Behavioral and pupillometric measures

Area of Science:

• Auditory Neuroscience
• Psychoacoustics
• Cognitive Psychology

Background:

• Pupillometry is an established method for quantifying listening effort in individuals with normal hearing.
• Previous research indicates that attention switching between auditory streams leads to pupil dilation, signifying cognitive load.

Purpose of the Study:

• To investigate listening effort using pupillometry in individuals with self-reported hearing difficulties compared to controls.
• To examine the impact of auditory stream segregation cues on listening effort during a target detection task.

Main Methods:

• A two-stream target detection task was employed, requiring participants to switch attention between auditory streams.
• Behavioral performance and pupillometric data (pupil dilation) were recorded.
• Three conditions manipulated the availability and type of stream segregation cues.

Main Results:

• Participants reporting listening difficulties exhibited significantly higher behavioral and pupillometric measures of listening effort than controls.
• Increased listening effort was particularly pronounced in conditions requiring attention switching or limited stream segregation cues.
• Findings suggest pupillometry can detect heightened listening effort in individuals with subjective hearing problems.

Conclusions:

• Subjective reports of listening difficulty in audiometrically normal individuals correlate with objective measures of listening effort.
• Pupillometry is a sensitive tool for identifying increased cognitive load associated with challenging listening conditions.
• The study highlights the utility of pupillometry in understanding the challenges faced by individuals with subtle auditory processing deficits.