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Cognition and aided speech recognition in noise: specific role for cognitive factors following nine-week experience with adjusted compression settings in hearing aids.
Linköping University, Department of Behavioural Sciences and Learning, Cognition, Development and Disability. Linköping University, Faculty of Arts and Sciences.
Linköping University, Department of Behavioural Sciences and Learning. Linköping University, Faculty of Arts and Sciences.
Linköping University, The Swedish Institute for Disability Research. Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Technical Audiology . Linköping University, Faculty of Health Sciences.
2009 (English)In: Scandinavian journal of psychology, ISSN 1467-9450, Vol. 50, no 5, 405-418 p.Article in journal (Refereed) Published
Abstract [en]

The working memory model for Ease of Language Understanding (ELU) proposes that language understanding under taxing conditions is related to explicit cognitive capacity. We refer to this as the mismatch hypothesis, since phonological representations based on the processing of speech under established conditions may not be accessed so readily when input conditions change and a match becomes problematic. Then, cognitive capacity requirements may differ from those used for processing speech hitherto. In the present study, we tested this hypothesis by investigating the relationship between aided speech recognition in noise and cognitive capacity in experienced hearing aid users when there was either a match or mismatch between processed speech input and established phonological representations. The settings in the existing digital hearing aids of the participants were adjusted to one of two different compression settings which processed the speech signal in qualitatively different ways ("fast" or "slow"). Testing took place after a 9-week period of experience with the new setting. Speech recognition was tested under different noise conditions and with match or mismatch (i.e. alternative compression setting) manipulations of the input signal. Individual cognitive capacity was measured using a reading span test and a letter monitoring test. Reading span, a reliable measure of explicit cognitive capacity, predicted speech recognition performance under mismatch conditions when processed input was incongruent with recently established phonological representations, due to the specific hearing aid setting. Cognitive measures were not main predictors of performance under match conditions. These findings are in line with the ELU model.

Place, publisher, year, edition, pages
2009. Vol. 50, no 5, 405-418 p.
Keyword [en]
Working memory • speech recognition in noise • hearing aids • amplitude compression
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-21333DOI: 10.1111/j.1467-9450.2009.00745.xPubMedID: 19778388OAI: oai:DiVA.org:liu-21333DiVA: diva2:241076
Available from: 2009-10-01 Created: 2009-10-01 Last updated: 2017-11-06

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Rudner, MaryFoo, CatharinaRönnberg, JerkerLunner, Thomas

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Cognition, Development and DisabilityFaculty of Arts and SciencesDepartment of Behavioural Sciences and LearningThe Swedish Institute for Disability ResearchDisability ResearchTechnical Audiology Faculty of Health Sciences
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