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Comparison of Gated Audiovisual Speech Identification in Elderly Hearing Aid Users and Elderly Normal-Hearing Individuals: Effects of Adding Visual Cues to Auditory Speech Stimuli
Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. Linköping University, The Swedish Institute for Disability Research. (Linnaeus Ctr HEAD)
Linköping University, Department of Behavioural Sciences and Learning, Psychology. Linköping University, Faculty of Arts and Sciences.
Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. Linköping University, The Swedish Institute for Disability Research. (Linnaeus Ctr HEAD)
2016 (English)In: TRENDS IN HEARING, ISSN 2331-2165, Vol. 20, 2331216516653355Article in journal (Refereed) PublishedText
Abstract [en]

The present study compared elderly hearing aid (EHA) users (n = 20) with elderly normal-hearing (ENH) listeners (n = 20) in terms of isolation points (IPs, the shortest time required for correct identification of a speech stimulus) and accuracy of audiovisual gated speech stimuli (consonants, words, and final words in highly and less predictable sentences) presented in silence. In addition, we compared the IPs of audiovisual speech stimuli from the present study with auditory ones extracted from a previous study, to determine the impact of the addition of visual cues. Both participant groups achieved ceiling levels in terms of accuracy in the audiovisual identification of gated speech stimuli; however, the EHA group needed longer IPs for the audiovisual identification of consonants and words. The benefit of adding visual cues to auditory speech stimuli was more evident in the EHA group, as audiovisual presentation significantly shortened the IPs for consonants, words, and final words in less predictable sentences; in the ENH group, audiovisual presentation only shortened the IPs for consonants and words. In conclusion, although the audiovisual benefit was greater for EHA group, this group had inferior performance compared with the ENH group in terms of IPs when supportive semantic context was lacking. Consequently, EHA users needed the initial part of the audiovisual speech signal to be longer than did their counterparts with normal hearing to reach the same level of accuracy in the absence of a semantic context.

Place, publisher, year, edition, pages
SAGE PUBLICATIONS INC , 2016. Vol. 20, 2331216516653355
Keyword [en]
audiovisual speech perception; EHA users; ENH listeners; gating paradigm
National Category
General Language Studies and Linguistics
Identifiers
URN: urn:nbn:se:liu:diva-130430DOI: 10.1177/2331216516653355ISI: 000379790000003PubMedID: 27317667OAI: oai:DiVA.org:liu-130430DiVA: diva2:951181
Note

Funding Agencies|Swedish Research Council [349-2007-8654]

Available from: 2016-08-07 Created: 2016-08-05 Last updated: 2016-08-22

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Moradi, ShahramLidestam, BjörnRönnberg, Jerker
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