Monitoring alpha oscillations and pupil dilation across the performance-intensity function
Listening to degraded speech can be challenging and requires a continuous investment of cognitive resources, which is more challenging for those with hearing loss. However, while alpha power (8-12 Hz) and pupil dilation have been suggested as objective correlates of listening effort, it is not clear...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2016-05-01
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| Series: | Frontiers in Psychology |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpsyg.2016.00745/full |
| _version_ | 1818901185779728384 |
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| author | Catherine M McMahon Catherine M McMahon Isabelle eBoisvert Isabelle eBoisvert Peter ede Lissa Peter ede Lissa Louise eGranger Louise eGranger Ronny eIbrahim Ronny eIbrahim Chi Yhun eLo Chi Yhun eLo Kelly eMiles Kelly eMiles Petra L Graham |
| author_facet | Catherine M McMahon Catherine M McMahon Isabelle eBoisvert Isabelle eBoisvert Peter ede Lissa Peter ede Lissa Louise eGranger Louise eGranger Ronny eIbrahim Ronny eIbrahim Chi Yhun eLo Chi Yhun eLo Kelly eMiles Kelly eMiles Petra L Graham |
| author_sort | Catherine M McMahon |
| collection | DOAJ |
| description | Listening to degraded speech can be challenging and requires a continuous investment of cognitive resources, which is more challenging for those with hearing loss. However, while alpha power (8-12 Hz) and pupil dilation have been suggested as objective correlates of listening effort, it is not clear whether they assess the same cognitive processes involved, or other sensory and/or neurophysiological mechanisms that are associated with the task. Therefore, the aim of this study is to compare alpha power and pupil dilation during a sentence recognition task in 15 randomized levels of noise (-7dB to +7dB SNR) using highly intelligible (16 channel vocoded) and moderately intelligible (6 channel vocoded) speech. Twenty young normal hearing adults participated in the study; however, due to extraneous noise, data from 16 (10 females, 6 males; aged 19-28 years) was used in the EEG analysis and 10 in the pupil analysis. Behavioral testing of perceived effort and speech performance was assessed at 3 fixed SNRs per participant and was comparable to sentence recognition performance assessed in the physiological test session for both 16- and 6-channel vocoded sentences. Results showed a significant interaction between channel vocoding for both the alpha power and the pupil size changes. While both measures significantly decreased with more positive SNRs for the 16-channel vocoding, this was not observed with the 6-channel vocoding. The results of this study suggest that these measures may encode different processes involved in speech perception, which show similar trends for highly intelligible speech, but diverge for more spectrally degraded speech. The results to date suggest that these objective correlates of listening effort, and the cognitive processes involved in listening effort, are not yet sufficiently well understood to be used within a clinical setting. |
| first_indexed | 2024-12-19T20:15:44Z |
| format | Article |
| id | doaj.art-79d7254cb02f487d8fe003b15e54476b |
| institution | Directory Open Access Journal |
| issn | 1664-1078 |
| language | English |
| last_indexed | 2024-12-19T20:15:44Z |
| publishDate | 2016-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Psychology |
| spelling | doaj.art-79d7254cb02f487d8fe003b15e54476b2022-12-21T20:07:10ZengFrontiers Media S.A.Frontiers in Psychology1664-10782016-05-01710.3389/fpsyg.2016.00745181770Monitoring alpha oscillations and pupil dilation across the performance-intensity functionCatherine M McMahon0Catherine M McMahon1Isabelle eBoisvert2Isabelle eBoisvert3Peter ede Lissa4Peter ede Lissa5Louise eGranger6Louise eGranger7Ronny eIbrahim8Ronny eIbrahim9Chi Yhun eLo10Chi Yhun eLo11Kelly eMiles12Kelly eMiles13Petra L Graham14Macquarie UniversityThe HEARing CRCMacquarie UniversityThe HEARing CRCThe HEARing CRCMacquarie UniversityMacquarie UniversityThe HEARing CRCMacquarie UniversityThe HEARing CRCMacquarie UniversityThe HEARing CRCMacquarie UniversityThe HEARing CRCMacquarie UniversityListening to degraded speech can be challenging and requires a continuous investment of cognitive resources, which is more challenging for those with hearing loss. However, while alpha power (8-12 Hz) and pupil dilation have been suggested as objective correlates of listening effort, it is not clear whether they assess the same cognitive processes involved, or other sensory and/or neurophysiological mechanisms that are associated with the task. Therefore, the aim of this study is to compare alpha power and pupil dilation during a sentence recognition task in 15 randomized levels of noise (-7dB to +7dB SNR) using highly intelligible (16 channel vocoded) and moderately intelligible (6 channel vocoded) speech. Twenty young normal hearing adults participated in the study; however, due to extraneous noise, data from 16 (10 females, 6 males; aged 19-28 years) was used in the EEG analysis and 10 in the pupil analysis. Behavioral testing of perceived effort and speech performance was assessed at 3 fixed SNRs per participant and was comparable to sentence recognition performance assessed in the physiological test session for both 16- and 6-channel vocoded sentences. Results showed a significant interaction between channel vocoding for both the alpha power and the pupil size changes. While both measures significantly decreased with more positive SNRs for the 16-channel vocoding, this was not observed with the 6-channel vocoding. The results of this study suggest that these measures may encode different processes involved in speech perception, which show similar trends for highly intelligible speech, but diverge for more spectrally degraded speech. The results to date suggest that these objective correlates of listening effort, and the cognitive processes involved in listening effort, are not yet sufficiently well understood to be used within a clinical setting.http://journal.frontiersin.org/Journal/10.3389/fpsyg.2016.00745/fullSpeech Perceptionpupil dilationAlpha powerlistening effortlistening in noisePerceived effort |
| spellingShingle | Catherine M McMahon Catherine M McMahon Isabelle eBoisvert Isabelle eBoisvert Peter ede Lissa Peter ede Lissa Louise eGranger Louise eGranger Ronny eIbrahim Ronny eIbrahim Chi Yhun eLo Chi Yhun eLo Kelly eMiles Kelly eMiles Petra L Graham Monitoring alpha oscillations and pupil dilation across the performance-intensity function Frontiers in Psychology Speech Perception pupil dilation Alpha power listening effort listening in noise Perceived effort |
| title | Monitoring alpha oscillations and pupil dilation across the performance-intensity function |
| title_full | Monitoring alpha oscillations and pupil dilation across the performance-intensity function |
| title_fullStr | Monitoring alpha oscillations and pupil dilation across the performance-intensity function |
| title_full_unstemmed | Monitoring alpha oscillations and pupil dilation across the performance-intensity function |
| title_short | Monitoring alpha oscillations and pupil dilation across the performance-intensity function |
| title_sort | monitoring alpha oscillations and pupil dilation across the performance intensity function |
| topic | Speech Perception pupil dilation Alpha power listening effort listening in noise Perceived effort |
| url | http://journal.frontiersin.org/Journal/10.3389/fpsyg.2016.00745/full |
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