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Pupil dilation uncovers extra listening effort in the presence of a single-talker masker.
Ear Hear. 2012 Mar-Apr; 33(2):291-300.EH

Abstract

OBJECTIVES

Recent research has demonstrated that pupil dilation, a measure of mental effort (cognitive processing load), is sensitive to differences in speech intelligibility. The present study extends this outcome by examining the effects of masker type and age on the speech reception threshold (SRT) and mental effort.

DESIGN

In young and middle-aged adults, pupil dilation was measured while they performed an SRT task, in which spoken sentences were presented in stationary noise, fluctuating noise, or together with a single-talker masker. The masker levels were adjusted to achieve 50% or 84% sentence intelligibility.

RESULTS

The results show better SRTs for fluctuating noise and a single-talker masker compared with stationary noise, which replicates results of previous studies. The peak pupil dilation, reflecting mental effort, was larger in the single-interfering speaker condition compared with the other masker conditions. Remarkably, in contrast to the thresholds, no differences in peak dilation were observed between fluctuating noise and stationary noise. This effect was independent of the intelligibility level and age.

CONCLUSIONS

To maintain similar intelligibility levels, participants needed more mental effort for speech perception in the presence of a single-talker masker and then with the two other types of maskers. This suggests an additive interfering effect of speech information from the single-talker masker. The dissociation between these performance and mental effort measures underlines the importance of including measurements of pupil dilation as an independent index of mental effort during speech processing in different types of noisy environments and at different intelligibility levels.

Authors+Show Affiliations

Department of ENT/Audiology and EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands. t.koelewijn@vumc.nlNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21921797

Citation

Koelewijn, Thomas, et al. "Pupil Dilation Uncovers Extra Listening Effort in the Presence of a Single-talker Masker." Ear and Hearing, vol. 33, no. 2, 2012, pp. 291-300.
Koelewijn T, Zekveld AA, Festen JM, et al. Pupil dilation uncovers extra listening effort in the presence of a single-talker masker. Ear Hear. 2012;33(2):291-300.
Koelewijn, T., Zekveld, A. A., Festen, J. M., & Kramer, S. E. (2012). Pupil dilation uncovers extra listening effort in the presence of a single-talker masker. Ear and Hearing, 33(2), 291-300. https://doi.org/10.1097/AUD.0b013e3182310019
Koelewijn T, et al. Pupil Dilation Uncovers Extra Listening Effort in the Presence of a Single-talker Masker. Ear Hear. 2012 Mar-Apr;33(2):291-300. PubMed PMID: 21921797.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Pupil dilation uncovers extra listening effort in the presence of a single-talker masker. AU - Koelewijn,Thomas, AU - Zekveld,Adriana A, AU - Festen,Joost M, AU - Kramer,Sophia E, PY - 2011/9/17/entrez PY - 2011/9/17/pubmed PY - 2012/6/27/medline SP - 291 EP - 300 JF - Ear and hearing JO - Ear Hear VL - 33 IS - 2 N2 - OBJECTIVES: Recent research has demonstrated that pupil dilation, a measure of mental effort (cognitive processing load), is sensitive to differences in speech intelligibility. The present study extends this outcome by examining the effects of masker type and age on the speech reception threshold (SRT) and mental effort. DESIGN: In young and middle-aged adults, pupil dilation was measured while they performed an SRT task, in which spoken sentences were presented in stationary noise, fluctuating noise, or together with a single-talker masker. The masker levels were adjusted to achieve 50% or 84% sentence intelligibility. RESULTS: The results show better SRTs for fluctuating noise and a single-talker masker compared with stationary noise, which replicates results of previous studies. The peak pupil dilation, reflecting mental effort, was larger in the single-interfering speaker condition compared with the other masker conditions. Remarkably, in contrast to the thresholds, no differences in peak dilation were observed between fluctuating noise and stationary noise. This effect was independent of the intelligibility level and age. CONCLUSIONS: To maintain similar intelligibility levels, participants needed more mental effort for speech perception in the presence of a single-talker masker and then with the two other types of maskers. This suggests an additive interfering effect of speech information from the single-talker masker. The dissociation between these performance and mental effort measures underlines the importance of including measurements of pupil dilation as an independent index of mental effort during speech processing in different types of noisy environments and at different intelligibility levels. SN - 1538-4667 UR - https://www.unboundmedicine.com/medline/citation/21921797/Pupil_dilation_uncovers_extra_listening_effort_in_the_presence_of_a_single_talker_masker_ L2 - https://doi.org/10.1097/AUD.0b013e3182310019 DB - PRIME DP - Unbound Medicine ER -