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The pupil response reveals increased listening effort when it is difficult to focus attention
Vrije University of Amsterdam Medical Centre, Netherlands; Vrije University of Amsterdam Medical Centre, Netherlands.
Vrije University of Amsterdam Medical Centre, Netherlands; Vrije University of Amsterdam Medical Centre, Netherlands.
Boston University, MA 02215 USA.
Linköping University, Department of Behavioural Sciences and Learning. Linköping University, The Swedish Institute for Disability Research. Vrije University of Amsterdam Medical Centre, Netherlands; Vrije University of Amsterdam Medical Centre, Netherlands.
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2015 (English)In: Hearing Research, ISSN 0378-5955, E-ISSN 1878-5891, Vol. 323, 81-90 p.Article in journal (Refereed) Published
Abstract [en]

Recent studies have shown that prior knowledge about where, when, and who is going to talk improves speech intelligibility. How related attentional processes affect cognitive processing load has not been investigated yet. In the current study, three experiments investigated how the pupil dilation response is affected by prior knowledge of target speech location, target speech onset, and who is going to talk. A total of 56 young adults with normal hearing participated. They had to reproduce a target sentence presented to one ear while ignoring a distracting sentence simultaneously presented to the other ear. The two sentences were independently masked by fluctuating noise. Target location (left or right ear), speech onset, and talker variability were manipulated in separate experiments by keeping these features either fixed during an entire block or randomized over trials. Pupil responses were recorded during listening and performance was scored after recall. The results showed an improvement in performance when the location of the target speech was fixed instead of randomized. Additionally, location uncertainty increased the pupil dilation response, which suggests that prior knowledge of location reduces cognitive load. Interestingly, the observed pupil responses for each condition were consistent with subjective reports of listening effort. We conclude that communicating in a dynamic environment like a cocktail party (where participants in competing conversations move unpredictably) requires substantial listening effort because of the demands placed on attentional processes. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Place, publisher, year, edition, pages
Elsevier , 2015. Vol. 323, 81-90 p.
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Educational Sciences
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URN: urn:nbn:se:liu:diva-118240DOI: 10.1016/j.heares.2015.02.004ISI: 000353740100009PubMedID: 25732724OAI: oai:DiVA.org:liu-118240DiVA: diva2:813542
Note

Funding Agencies|Netherlands Organization for Scientific Research (NWO) [451-12-039]

Available from: 2015-05-22 Created: 2015-05-22 Last updated: 2017-12-04

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Zekveld, Adriana

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