Predictive Sentence Context Reduces Listening Effort in Older Adults With and Without Hearing Loss and With High and Low Working Memory Capacity.
Cynthia R Hunter, Larry E Humes
PMID 34983897WHAT IT FOUND
Listening to sentences with predictable endings frees up mental resources for older adults, even those with hearing loss or low working memory.
Clinicians should encourage communication partners to use clear, predictable context to reduce listening fatigue.
Key findings
01Participants recalled digits more accurately and quickly when the spoken sentence they were listening to had a predictable ending.
02This reduction in listening effort occurred regardless of whether the participant had hearing loss or normal hearing.
03The benefit of predictable context was seen in both high and low working memory groups, suggesting it does not rely on limited cognitive resources.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study used individualized signal-to-noise ratios to equalize baseline speech intelligibility across groups. This means the findings apply to situations where the listener can hear the words with similar accuracy, but may not generalize to everyday settings where a patient with hearing loss struggles significantly more than a normal-hearing peer. The working memory task difficulty was adjusted based on capacity (low memory group had fewer digits to remember). While this prevented floor effects, it means the 'high load' condition was not identical in absolute terms across groups, limiting direct comparison of absolute effort costs. Participants were cognitively healthy older adults who passed a screening for impairment, so results may not apply to those with diagnosed dementia or significant cognitive decline.
Declared interests
Research support from N.I.H., Extramural.
The easy way to misread this
Do not assume that patients with hearing loss will find predictable context easier to use than those with normal hearing. The study controlled for speech intelligibility by adjusting the noise level, so the benefit was equal. In real-world noisy situations where hearing loss makes the signal much harder to hear, the cognitive cost of simply detecting the words may outweigh the benefit of the context.