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Article: Deficits In Processing Characters In Chinese Developmental Dyslexia: Preliminary Results From Event-related Potentials And Time Frequency Analyses

TitleDeficits In Processing Characters In Chinese Developmental Dyslexia: Preliminary Results From Event-related Potentials And Time Frequency Analyses
Authors
KeywordsChinese developmental dyslexia
Event-related potentials
Time frequency analysis
Chinese character recognition
Issue Date2011
PublisherMacrothink Institute, Inc. The Journal's web site is located at http://www.macrothink.org/journal/index.php/ijl/
Citation
International Journal of Linguistics, 2011, v. 3 n. 1, article no. E11 How to Cite?
AbstractIndividuals with dyslexia have deficiencies in lexical organization and processing that are behaviorally manifested as difficulties in learning grapheme-phoneme correspondences. The present study investigates the lexical representations of Chinese reading-impaired children using event-related potentials (ERP) and time-frequency analysis. Two Cantonese-speaking male children, one with reading impairment (PR) and one with normal reading performance (CA), performing a character recognition task were conducted. ERP results indicated that CA showed lexicality effect at N400 and N170 that was not evident in PR. The time-frequency analyses found greater event-related synchronization and phase coherence at theta band suggesting greater cognitive demand in processing pseudowords than real words for CA. Greater synchronization between cortical regions was also observed at the gamma band for pseudowords. These differences were not found for PR, suggesting that PR may have weaker lexical representations, resulting in inefficient orthographic processing and perhaps difficulties in accessing phonological and/or semantic information of known characters.
Persistent Identifierhttp://hdl.handle.net/10722/135489
ISSN

 

DC FieldValueLanguage
dc.contributor.authorSu, IFen_US
dc.contributor.authorLau, DKYen_US
dc.contributor.authorZhang, Zen_US
dc.contributor.authorYan, Nen_US
dc.contributor.authorLaw, SPen_US
dc.date.accessioned2011-07-27T01:35:56Z-
dc.date.available2011-07-27T01:35:56Z-
dc.date.issued2011en_US
dc.identifier.citationInternational Journal of Linguistics, 2011, v. 3 n. 1, article no. E11en_US
dc.identifier.issn1948-5425en_US
dc.identifier.urihttp://hdl.handle.net/10722/135489-
dc.description.abstractIndividuals with dyslexia have deficiencies in lexical organization and processing that are behaviorally manifested as difficulties in learning grapheme-phoneme correspondences. The present study investigates the lexical representations of Chinese reading-impaired children using event-related potentials (ERP) and time-frequency analysis. Two Cantonese-speaking male children, one with reading impairment (PR) and one with normal reading performance (CA), performing a character recognition task were conducted. ERP results indicated that CA showed lexicality effect at N400 and N170 that was not evident in PR. The time-frequency analyses found greater event-related synchronization and phase coherence at theta band suggesting greater cognitive demand in processing pseudowords than real words for CA. Greater synchronization between cortical regions was also observed at the gamma band for pseudowords. These differences were not found for PR, suggesting that PR may have weaker lexical representations, resulting in inefficient orthographic processing and perhaps difficulties in accessing phonological and/or semantic information of known characters.-
dc.languageengen_US
dc.publisherMacrothink Institute, Inc. The Journal's web site is located at http://www.macrothink.org/journal/index.php/ijl/en_US
dc.relation.ispartofInternational Journal of Linguisticsen_US
dc.subjectChinese developmental dyslexia-
dc.subjectEvent-related potentials-
dc.subjectTime frequency analysis-
dc.subjectChinese character recognition-
dc.titleDeficits In Processing Characters In Chinese Developmental Dyslexia: Preliminary Results From Event-related Potentials And Time Frequency Analysesen_US
dc.typeArticleen_US
dc.identifier.emailSu, IF: ifansu@hku.hken_US
dc.identifier.emailLau, DKY: dustin@graduate.hku.hken_US
dc.identifier.emailZhang, Z: zgzhang@eee.hku.hken_US
dc.identifier.emailYan, N: nyan@hku.hken_US
dc.identifier.emailLaw, SP: splaw@hkucc.hku.hk-
dc.identifier.authorityZhang, Z=rp01565en_US
dc.identifier.authorityYan, N=rp00978en_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.5296/ijl.v3i1.722-
dc.identifier.hkuros187736en_US
dc.identifier.volume3en_US
dc.identifier.issue1, article no. E11-
dc.publisher.placeUnited States-

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