ISSN : 1226-9654
본 연구는 중의적 해석이 가능한 특정 영어구문에 대해 한국어 모국어화자들의 해석과정을 해당어구의 읽기시간과 신경생리학적 지표로서의 사건관련전위(Event-related Potentials; ERPs)를 이용하여 확인하고자 하였다. 외국어로서의 영어를 처리하는 과정에서의 구문적 중의성이 내포된 미로문장(garden path sentence; GPS)과 이른종결문장(early closure sentence; ECS)을 대상으로 자기 조절 읽기 과제(self-paced reading)를 사용하여, 중의어구가 포함된 실험문장과 중의성이 개재되지 않은 통제문장에서의 반응을 얻었다. 실험결과, 미로문장 통제조건 및 이른종결문장 조건의 중의성 관련어에서 유의미하게 읽기 반응시간이 지연되어 나타났다. 또한 동일 유형의 중의구문에 대한 ERP 실험에서도 차별적 신경활성화 지표를 확인할 수 있었는데, 미로문장 조건에서는 구문재분석 부담이 증가되는 방향의 지표인 P600이 두드러진 데 비해, 이른종결문장 유형은 해당어구의 의미역할 변화를 초래하는 방향으로 해석가능한 N400에서 그 차이가 나타났다. 이와 같은 결과는 각기 다른 해석방법을 지니는 복문의 상이한 유형이 그 구조의 차이 외에 의미적 해석이 우선적으로 적용될 수 있으며, 중의구조 유형 간 해소과정이 각기 다른 처리단원으로 분리되어 있음을 시사한다.
This study was conducted to find how to process an ambiguous sentence related with garden-path sentence(GPS) and early closure sentence(ECS), and to reveal the difference of contribution between their syntactic and semantic informations using ERPs. Task to be required is to read silently and respond to the presented English phrase by self-paced reading method. Analyses on behavioral response time show the significant delayed response to the controlled GPS and ECS condition. The current ERP results showed that embedded GPS sentences elicited more enhanced P600 but a slight difference of N400 while ECS sentences were more sensitive to N400 than small difference of P600. These results signify that on-line processing of ambiguity-related embedded sentence can be diverged based on the burden of interpretation of the given ambiguous word. Differential ERPs components in each type of experimental sentences suggest that the difficulty of sentential reanalysis as reflected on P600, and the need of the shift on thematic role indexed as N400 respectively were differently involved in processing English ambiguous-embedded sentences.
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