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Effects of lexicality and regularity on reading aloud performance in aphasia

Title
Effects of lexicality and regularity on reading aloud performance in aphasia
Authors
Kim W.J.Sung J.E.
Ewha Authors
성지은
SCOPUS Author ID
성지은scopus
Issue Date
2017
Journal Title
Communication Sciences and Disorders
ISSN
2288-1328JCR Link
Citation
Communication Sciences and Disorders vol. 22, no. 1, pp. 117 - 128
Keywords
AphasiaLexicalityReadingRegularity
Publisher
Korean Academy of Speech-Language Pathology and Audiology
Indexed
SCOPUS scopus
Document Type
Article
Abstract
Objectives: The purpose of the study was to evaluate the reading ability of persons with aphasia (PWA) according to lexicality and regularity. Methods: Twenty individuals with aphasia and 20 age- and education-matched normal individuals participated in the study. Experimental stimuli were manipulated based on the lexicality and regularity of two-syllable structures at word-level. Accuracy (%) served as a dependent measure, and the types of error were analyzed. Results: For the reading accuracy, PWA performed significantly worse than the control group. Participants demonstrated greater difficulties in reading non-words and irregular words across the groups. The two-way interaction between group and lexicality was significant, indicating that PWA demonstrated greater difficulties in reading non-words than words compared to the control group. Regression analyses revealed that regular non-word condition accounted for 47.7% of the total variance as a significant predictor. In the error type analyses, the error ratio of regular non-word condition was 71.74%, which was greater than that of word condition, 28.26%. Regularization error was 14.75% in non-word condition and 9.36% in word condition. Conclusion: These results indicated that PWA demonstrated greater reading difficulties than the control group, and their performance was differentially affected by the lexicality. Lexicality seems to play a critical factor in differentiating PWA from the normal control group. The results are consistent with previous findings that suggested that non-word reading was more difficult than words. The current study suggested that overall severity of aphasia was predicted by regular non-word condition, which placed greater processing burden on grapheme-to-phoneme conversion. © 2017 Korean Academy of Speech-Language Pathology and Audiology.
DOI
10.12963/csd.17377
Appears in Collections:
사범대학 > 언어병리학과 > Journal papers
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