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Stimulus Specific to Age-Related Audio-Visual Integration in Discrimination Tasks

Age-related audio-visual integration (AVI) has been investigated extensively; however, AVI ability is either enhanced or reduced with ageing, and this matter is still controversial because of the lack of systematic investigations. To remove possible variates, 26 older adults and 26 younger adults we...

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Autores principales: Ren, Yanna, Xu, Zhihan, Lu, Sa, Wang, Tao, Yang, Weiping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7739091/
https://www.ncbi.nlm.nih.gov/pubmed/33403096
http://dx.doi.org/10.1177/2041669520978419
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author Ren, Yanna
Xu, Zhihan
Lu, Sa
Wang, Tao
Yang, Weiping
author_facet Ren, Yanna
Xu, Zhihan
Lu, Sa
Wang, Tao
Yang, Weiping
author_sort Ren, Yanna
collection PubMed
description Age-related audio-visual integration (AVI) has been investigated extensively; however, AVI ability is either enhanced or reduced with ageing, and this matter is still controversial because of the lack of systematic investigations. To remove possible variates, 26 older adults and 26 younger adults were recruited to conduct meaningless and semantic audio-visual discrimination tasks to assess the ageing effect of AVI systematically. The results for the mean response times showed a significantly faster response to the audio-visual (AV) target than that to the auditory (A) or visual (V) target and a significantly faster response to all targets by the younger adults than that by the older adults (A, V, and AV) in all conditions. In addition, a further comparison of the differences between the probability of audio-visual cumulative distributive functions (CDFs) and race model CDFs showed delayed AVI effects and a longer time window for AVI in older adults than that in younger adults in all conditions. The AVI effect was lower in older adults than that in younger adults during simple meaningless image discrimination (63.0 ms vs. 108.8 ms), but the findings were inverse during semantic image discrimination (310.3 ms vs. 127.2 ms). In addition, there was no significant difference between older and younger adults during semantic character discrimination (98.1 ms vs. 117.2 ms). These results suggested that AVI ability was impaired in older adults, but a compensatory mechanism was established for processing sematic audio-visual stimuli.
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spelling pubmed-77390912021-01-04 Stimulus Specific to Age-Related Audio-Visual Integration in Discrimination Tasks Ren, Yanna Xu, Zhihan Lu, Sa Wang, Tao Yang, Weiping Iperception Article Age-related audio-visual integration (AVI) has been investigated extensively; however, AVI ability is either enhanced or reduced with ageing, and this matter is still controversial because of the lack of systematic investigations. To remove possible variates, 26 older adults and 26 younger adults were recruited to conduct meaningless and semantic audio-visual discrimination tasks to assess the ageing effect of AVI systematically. The results for the mean response times showed a significantly faster response to the audio-visual (AV) target than that to the auditory (A) or visual (V) target and a significantly faster response to all targets by the younger adults than that by the older adults (A, V, and AV) in all conditions. In addition, a further comparison of the differences between the probability of audio-visual cumulative distributive functions (CDFs) and race model CDFs showed delayed AVI effects and a longer time window for AVI in older adults than that in younger adults in all conditions. The AVI effect was lower in older adults than that in younger adults during simple meaningless image discrimination (63.0 ms vs. 108.8 ms), but the findings were inverse during semantic image discrimination (310.3 ms vs. 127.2 ms). In addition, there was no significant difference between older and younger adults during semantic character discrimination (98.1 ms vs. 117.2 ms). These results suggested that AVI ability was impaired in older adults, but a compensatory mechanism was established for processing sematic audio-visual stimuli. SAGE Publications 2020-12-13 /pmc/articles/PMC7739091/ /pubmed/33403096 http://dx.doi.org/10.1177/2041669520978419 Text en © The Author(s) 2020 https://creativecommons.org/licenses/by/4.0/ Creative Commons CC BY: This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
spellingShingle Article
Ren, Yanna
Xu, Zhihan
Lu, Sa
Wang, Tao
Yang, Weiping
Stimulus Specific to Age-Related Audio-Visual Integration in Discrimination Tasks
title Stimulus Specific to Age-Related Audio-Visual Integration in Discrimination Tasks
title_full Stimulus Specific to Age-Related Audio-Visual Integration in Discrimination Tasks
title_fullStr Stimulus Specific to Age-Related Audio-Visual Integration in Discrimination Tasks
title_full_unstemmed Stimulus Specific to Age-Related Audio-Visual Integration in Discrimination Tasks
title_short Stimulus Specific to Age-Related Audio-Visual Integration in Discrimination Tasks
title_sort stimulus specific to age-related audio-visual integration in discrimination tasks
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7739091/
https://www.ncbi.nlm.nih.gov/pubmed/33403096
http://dx.doi.org/10.1177/2041669520978419
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