Abstract
The present study examined the effect of hearing aid use on cognitive test performance using a single-subject treatment design. Six participants 54 to 64 years old with sensorineural hearing loss were fitted with hearing aids. Participants used the hearing aids for approximately 8 hr each day for the duration of the study. A battery of cognitive tests was administered to participants during baseline (pre-hearing aid fitting), treatment (hearing aid use), and withdrawal (post-hearing aid use) study phases over a period of 6 months of hearing aid use. All participants showed significant improvements in performance on the cognitive test measures with hearing aid use. The most significant treatment effects were evidenced at 2 to 4 weeks of hearing aid use on the Listening Span Test and an auditory selective attention task. In many cases, cognitive performance scores returned to baseline levels after the participant stopped using the hearing aids. The findings from this study are consistent with the hypothesis that hearing aid use may improve cognitive performance by improving audibility and decreasing the cognitive load of the listening task.
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