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Grapheme-phoneme conversion in Korean Word Recognition: Evidence from event-related potentials

Title
Grapheme-phoneme conversion in Korean Word Recognition: Evidence from event-related potentials
Authors
Choi S.J.Sim H.S.
Ewha Authors
심현섭
SCOPUS Author ID
심현섭scopus
Issue Date
2019
Journal Title
Communication Sciences and Disorders
ISSN
2288-1328JCR Link
Citation
Communication Sciences and Disorders vol. 24, no. 3, pp. 647 - 655
Keywords
Dual Route modelDyslexiaGrapheme-phoneme conversionN250Phonological processingWord recognition
Publisher
Korean Academy of Speech-Language Pathology and Audiology
Indexed
SCOPUS scopus
Document Type
Article
Abstract
Although Hangul, the Korean alphabet, is orthographically shallow, the phonological rules cause difficulties for dyslexic children in reading and writing. We investigated the difference in grapheme-phoneme conversion (GPC) of Korean words and nonce words when phonological rules are applied. Based on the dual route theory, we tried to explain the activation of the GPC route. Methods: We recorded EEGs from 28 native Korean adults while they were conducting a phoneme judgment task in which they were asked to decide whether the pronunciation of the visual word was identical to the corresponding auditory word. Response accuracy rate, reaction time, and N250 waveforms were analyzed for phonological processing in word recognition. Results: For the mean response accuracy rates and reaction times of the phoneme judgment task, there was a significant main effect of the stimulus word category and of the applied rules. The event-related potential (ERP) showed significantly smaller amplitude of N250 in words than in nonce-words. Specifically, for the words, the N250 waveform was smaller in incorrect pronunciation than with correct pronunciation. However, there was no significant effect in nonce words. Conclusion: The result provides support for the dual route model of reading and writing. In Korean word recognition, people automatically apply phonological rules with familiar words, however, GPC causes a delay when recognizing unfamiliar words. © 2019 Korean Academy of Speech-Language Pathology and Audiology.
DOI
10.12963/csd.19644
Appears in Collections:
사범대학 > 언어병리학과 > Journal papers
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