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Benefits of phoneme discrimination training in a randomized controlled trial of 50- to 74-year-olds with mild hearing loss

Ferguson, Melanie A.; Henshaw, Helen; Clark, Daniel; Moore, David R.

Authors

Melanie A. Ferguson melanie.ferguson@nottingham.ac.uk

Helen Henshaw helen.henshaw@nottingham.ac.uk

Daniel Clark clarkd@hope.ac.uk

David R. Moore david.moore@cchmc.org



Abstract

Objectives: The aims of this study were to (i) evaluate the efficacy of phoneme discrimination training for hearing and cognitive abilities of adults aged 50 to 74 years with mild sensorineural hearing loss who were not users of hearing aids, and to (ii) determine participant compliance with a self-administered, computer-delivered, home- and game-based auditory training program.

Design: This study was a randomized controlled trial with repeated measures and crossover design. Participants were trained and tested over an 8- to 12-week period. One group (Immediate Training) trained during weeks 1 and 4. A second waitlist group (Delayed Training) did no training during weeks 1 and 4, but then trained during weeks 5 and 8. On-task (phoneme discrimination) and transferable outcome measures (speech perception, cognition, self-report of hearing disability) for both groups were obtained during weeks 0, 4, and 8, and for the Delayed Training group only at week 12.

Results: Robust phoneme discrimination learning was found for both groups, with the largest improvements in threshold shown for those with the poorest initial thresholds. Between weeks 1 and 4, the Immediate Training group showed moderate, significant improvements on self-report of hearing disability, divided attention, and working memory, specifically for conditions or situations that were more complex and therefore more challenging. Training did not result in consistent improvements in speech perception in noise. There was no evidence of any test-retest effects between weeks 1 and 4 for the Delayed Training group. Retention of benefit at 4 weeks post-training was shown for phoneme discrimination, divided attention, working memory, and self-report of hearing disability. Improved divided attention and reduced self-reported hearing difficulties were highly correlated.

Conclusions: It was observed that phoneme discrimination training benefits some but not all people with mild hearing loss. Evidence presented here, together with that of other studies that used different training stimuli, suggests that auditory training may facilitate cognitive skills that index executive function and the self-perception of hearing difficulty in challenging situations. The development of cognitive skills may be more important than the development of sensory skills for improving communication and speech perception in everyday life. However, improvements were modest. Outcome measures need to be appropriately challenging to be sensitive to the effects of the relatively small amount of training performed.

Journal Article Type Article
Publication Date Jan 1, 2014
Journal Ear and Hearing
Print ISSN 0196-0202
Electronic ISSN 0196-0202
Publisher Lippincott, Williams & Wilkins
Peer Reviewed Peer Reviewed
Volume 35
Issue 4
Article Number e110-e121
APA6 Citation Ferguson, M. A., Henshaw, H., Clark, D., & Moore, D. R. (2014). Benefits of phoneme discrimination training in a randomized controlled trial of 50- to 74-year-olds with mild hearing loss. Ear and Hearing, 35(4), doi:10.1097/AUD.0000000000000020. ISSN 0196-0202
DOI https://doi.org/10.1097/AUD.0000000000000020
Keywords Auditory; cognition; learning; speech perception; training
Publisher URL http://journals.lww.com/ear-hearing/Fulltext/2014/07000/Benefits_of_Phoneme_Discrimination_Training_in_a.13.aspx
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0





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