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The visual magnocellular-dorsal dysfunction in Chinese children with developmental dyslexia impedes Chinese character recognition
The visual magnocellular-dorsal (M-D) deficit theory of developmental dyslexia (DD) is still highly debated. Many researchers have made great efforts to investigate the relationship between M-D dysfunction and reading disability. Given that visual analysis plays an important role in Chinese reading,...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4238300/ https://www.ncbi.nlm.nih.gov/pubmed/25412386 http://dx.doi.org/10.1038/srep07068 |
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author | Zhao, Jing Qian, Yi Bi, Hong-Yan Coltheart, Max |
author_facet | Zhao, Jing Qian, Yi Bi, Hong-Yan Coltheart, Max |
author_sort | Zhao, Jing |
collection | PubMed |
description | The visual magnocellular-dorsal (M-D) deficit theory of developmental dyslexia (DD) is still highly debated. Many researchers have made great efforts to investigate the relationship between M-D dysfunction and reading disability. Given that visual analysis plays an important role in Chinese reading, the present study tried to examine how the M-D dysfunction affected Chinese character recognition in Chinese children with DD. Sixteen DD children with M-D deficit, fifteen DD children with normal M-D function and twenty-seven age-matched typically developing children participated in this study. A global/local decision task was adopted, in which we manipulated the spatial frequency of target characters to separate an M-D condition from an unfiltered condition. Results of reaction times and error rates showed that in the M-D condition both M-D normal dyslexics and controls exhibited a significant global precedence effect, with faster responses and lower error rates in global decision than in local decision. In contrast, this global advantage was absent for the M-D impaired dyslexics. Accordingly, we propose that the M-D impairment present in some but not all dyslexics might influence global recognition of Chinese characters in this subgroup of children with DD, which might be implicated in their difficulties in learning to read. |
format | Online Article Text |
id | pubmed-4238300 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-42383002014-12-04 The visual magnocellular-dorsal dysfunction in Chinese children with developmental dyslexia impedes Chinese character recognition Zhao, Jing Qian, Yi Bi, Hong-Yan Coltheart, Max Sci Rep Article The visual magnocellular-dorsal (M-D) deficit theory of developmental dyslexia (DD) is still highly debated. Many researchers have made great efforts to investigate the relationship between M-D dysfunction and reading disability. Given that visual analysis plays an important role in Chinese reading, the present study tried to examine how the M-D dysfunction affected Chinese character recognition in Chinese children with DD. Sixteen DD children with M-D deficit, fifteen DD children with normal M-D function and twenty-seven age-matched typically developing children participated in this study. A global/local decision task was adopted, in which we manipulated the spatial frequency of target characters to separate an M-D condition from an unfiltered condition. Results of reaction times and error rates showed that in the M-D condition both M-D normal dyslexics and controls exhibited a significant global precedence effect, with faster responses and lower error rates in global decision than in local decision. In contrast, this global advantage was absent for the M-D impaired dyslexics. Accordingly, we propose that the M-D impairment present in some but not all dyslexics might influence global recognition of Chinese characters in this subgroup of children with DD, which might be implicated in their difficulties in learning to read. Nature Publishing Group 2014-11-20 /pmc/articles/PMC4238300/ /pubmed/25412386 http://dx.doi.org/10.1038/srep07068 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/ |
spellingShingle | Article Zhao, Jing Qian, Yi Bi, Hong-Yan Coltheart, Max The visual magnocellular-dorsal dysfunction in Chinese children with developmental dyslexia impedes Chinese character recognition |
title | The visual magnocellular-dorsal dysfunction in Chinese children with developmental dyslexia impedes Chinese character recognition |
title_full | The visual magnocellular-dorsal dysfunction in Chinese children with developmental dyslexia impedes Chinese character recognition |
title_fullStr | The visual magnocellular-dorsal dysfunction in Chinese children with developmental dyslexia impedes Chinese character recognition |
title_full_unstemmed | The visual magnocellular-dorsal dysfunction in Chinese children with developmental dyslexia impedes Chinese character recognition |
title_short | The visual magnocellular-dorsal dysfunction in Chinese children with developmental dyslexia impedes Chinese character recognition |
title_sort | visual magnocellular-dorsal dysfunction in chinese children with developmental dyslexia impedes chinese character recognition |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4238300/ https://www.ncbi.nlm.nih.gov/pubmed/25412386 http://dx.doi.org/10.1038/srep07068 |
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