ISSN : 1226-9654
본 연구의 목적은 시각적 단어재인 과정에서 음운부호가 하위 어휘 수준(sublexical level)에서부터 활성화 되는지를 규명하는 것이다. 이를 위하여 본 연구에서는 표기와 발음이 일치하는 규칙 단어(예, 결백)와 표기와 발음이 일치하지 않는 불규칙 단어(예, 잡무)를 재인할 때 발생하는 사건관련 뇌전위(이하, ERP)를 비교하였다. 만약 어휘접근 이전에 음운부호가 활성화된다면 표기-음운 변환을 반영하는 N320에서 규칙 단어와 불규칙 단어의 차이가 나타날 것으로 예측하였다. 21명의 어휘판단 과제 수행 시 수집된 ERP를 비교한 결과 예상한 바와 같이 불규칙 단어의 N320이 규칙 단어에 비해 더 크게 나타났다. 이 결과는 시각적 단어재인 시에 음운부호가 하위 어휘 수준에서부터 활성화된다는 것을 보여준다.
The purpose of the current study was to investigate whether phonological information of the visually presented word is activated before lexical access. To do so, the present study compared ERPs of the irregular words and regular words. Since N320 component has been known as an ERP component reflecting grapheme to phoneme conversion, we would expect different N320 waves between irregular and regular words if phonological information is activated before lexical access. As expected, the results showed larger N320 for irregular words than regular words. The present study supported the idea that phonological information is activated from the sublexical level during visual word recognition processing.
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