Alpha-Band Dynamics of Hearing Aid Wearers Performing the Repeat-Recall Test (RRT).
Christopher Slugocki, Francis Kuk, Petri Korhonen
PMID 38549287WHAT IT FOUND
Brain activity patterns matched patients' self-reported listening effort, validating the Repeat-Recall Test.
Adding a memory task made listening feel harder without reducing speech understanding. Clinicians can trust patient effort ratings as a separate, valid measure of listening difficulty.
Key findings
01Subjective ratings of listening effort correlated significantly with posterior alpha-band brain activity, validating the self-report method.
02Requiring patients to remember sentences increased their reported effort and brain activity associated with effort, but did not reduce their immediate speech repetition scores.
03The benefit of meaningful context on brain effort patterns disappeared when patients were also asked to remember the sentences.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The sample size was small (16 participants), and the relationship between brain activity and effort varied between individuals, with some showing no clear link. All participants wore the same study hearing aids, which may not reflect how they perform with their own personalized devices. The test did not include easier listening conditions (higher signal-to-noise ratios), so it is unclear if effort ratings would have dropped in very quiet environments. This was a single-session study with no formal acclimatization period to the study hearing aids.
Declared interests
All authors are employees of WS Audiology, the manufacturer of the hearing aids used in the study.
The easy way to misread this
Do not assume that all patients' self-reported effort ratings accurately reflect their physiological listening effort. While the group average showed a significant correlation, individual data showed that some participants had negative or no relationship between their brain activity and their subjective ratings.