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Neural tracking of linguistic and acoustic speech representations decreases with advancing age
public 722072;https://creativecommons.org/licenses/by-nc-nd/4.0/ 699234;All rights reserved ;ISSN: 1095-9572 ;ISSN: 1053-8119 ;EISSN: 1095-9572 ;DOI: 10.1016/j.neuroimage.2022.119841
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Title:
Neural tracking of linguistic and acoustic speech representations decreases with advancing age
Author:
Gillis, Marlies
;
Kries, Jill
;
Vandermosten, Maaike
;
Francart, Tom
Subjects:
Aging
;
Lifespan
;
Linguistic processing
;
Neural tracking
;
Speech processing
;
Speech understanding
Description:
BACKGROUND: Older adults process speech differently, but it is not yet clear how aging affects different levels of processing natural, continuous speech, both in terms of bottom-up acoustic analysis and top-down generation of linguistic-based predictions. We studied natural speech processing across the adult lifespan via electroencephalography (EEG) measurements of neural tracking. GOALS: Our goals are to analyze the unique contribution of linguistic speech processing across the adult lifespan using natural speech, while controlling for the influence of acoustic processing. Moreover, we also studied acoustic processing across age. In particular, we focus on changes in spatial and temporal activation patterns in response to natural speech across the lifespan. METHODS: 52 normal-hearing adults between 17 and 82 years of age listened to a naturally spoken story while the EEG signal was recorded. We investigated the effect of age on acoustic and linguistic processing of speech. Because age correlated with hearing capacity and measures of cognition, we investigated whether the observed age effect is mediated by these factors. Furthermore, we investigated whether there is an effect of age on hemisphere lateralization and on spatiotemporal patterns of the neural responses. RESULTS: Our EEG results showed that linguistic speech processing declines with advancing age. Moreover, as age increased, the neural response latency to certain aspects of linguistic speech processing increased. Also acoustic neural tracking (NT) decreased with increasing age, which is at odds with the literature. In contrast to linguistic processing, older subjects showed shorter latencies for early acoustic responses to speech. No evidence was found for hemispheric lateralization in neither younger nor older adults during linguistic speech processing. Most of the observed aging effects on acoustic and linguistic processing were not explained by age-related decline in hearing capacity or cognition. However, our results suggest that the effect of decreasing linguistic neural tracking with advancing age at word-level is also partially due to an age-related decline in cognition than a robust effect of age. CONCLUSION: Spatial and temporal characteristics of the neural responses to continuous speech change across the adult lifespan for both acoustic and linguistic speech processing. These changes may be traces of structural and/or functional change that occurs with advancing age. status: published
Publisher:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Creation Date:
2023-02
Language:
English
Identifier:
ISSN: 1095-9572
ISSN: 1053-8119
EISSN: 1095-9572
DOI: 10.1016/j.neuroimage.2022.119841
Source:
ProQuest One Psychology
Lirias (KU Leuven Association)
Alma/SFX Local Collection
ProQuest Central
DOAJ Directory of Open Access Journals
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