TY - JOUR
T1 - Grapheme-phoneme conversion in Korean Word Recognition
T2 - Evidence from event-related potentials
AU - Choi, Sou Jin
AU - Sim, Hyun Sub
N1 - Publisher Copyright:
© 2019 Korean Academy of Speech-Language Pathology and Audiology.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
KW - Dual Route model
KW - Dyslexia
KW - Grapheme-phoneme conversion
KW - N250
KW - Phonological processing
KW - Word recognition
UR - http://www.scopus.com/inward/record.url?scp=85075018614&partnerID=8YFLogxK
U2 - 10.12963/csd.19644
DO - 10.12963/csd.19644
M3 - Article
AN - SCOPUS:85075018614
SN - 2288-1328
VL - 24
SP - 647
EP - 655
JO - Communication Sciences and Disorders
JF - Communication Sciences and Disorders
IS - 3
ER -