한국어 명사어절의 시각적 정보처리과정과 관련된 좌우반구의 언어처리과정 탐구: 좌우시야 분할 연구
The Research for Language Information Processing of Bilateral Hemispheres on Korean Noun Eojeol: Visual Half-field Study
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참고문헌
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초록
좌우반구의 언어정보처리 특성은 매우 상이하나 좌우반구에서 어떤 종류의 언어정보가 다르게 재인되는지에 대한 연구는 드물다. 한국어 어절은 형태소, 단어, 문장성분 등의 정보를 담고 있는 복잡한 언어단위로 좌우반구에서 여러 종류의 언어정보를 다른 방법으로 정보처리 할 가능성을 조사하기에 적절하다. 본 연구의 목적은 어절판단과제(Eojeol decision task)를 좌우시야분할 연구방법(visual half-field study)으로 제시하여 명사어절 정보처리과정과 관련된 좌우반구의 어절정보처리에 대해 탐구하는 것이다. 이를 위해, 본 연구에서는 어절이 중앙시야에 제시되는 실험과 우시야 혹은 좌시야에 제시되는 실험이 수행되었다. 그 후에 어절판단시간에 유의미하게 영향을 미치는 어절변인들을 분석하기 위해 상관 분석과 회귀 분석이 수행되었으며, 이를 통해 어절이 중앙시야에 제시될 때에 비해 우시야 혹은 좌시야에 제시될 경우 추가적으로 유의미한 어절변인들을 확인하였다. 실험 결과, 우시야 조건에서는 ‘어근 빈도’ 변인이 추가적으로 유의미하게 나타났으며 좌시야 조건에서는 ‘획 수’, ‘음절 수’, ‘자모 수’, ‘사전적 의미 수’, 그리고 ‘주관적 의미 수’ 변인들이 추가적으로 유의미하게 나타났다. 각 시야 조건에서 추가적으로 유의미한 어절변인들이 나타난 이유는 자극정보처리를 한쪽 반구가 우선적으로 처리하도록 유도할 경우 다른 쪽 반구 기능이 미숙하게 나타나 이를 보상하기 위한 인지처리반응이 나타나기 때문인 것으로 여겨진다. 그리고 이 인지처리반응은 해당 반구에서 정보처리 할 수 있는 반구-특성적(hemisphere-specific) 기능과 관련 있을 것으로 여겨진다. 결과적으로, 본 연구에서는 명사어절이 중앙시야에 제시된 경우와 우시야 혹은 좌시야에 제시된 경우에 따라 다르게 나타나는 반응을 통해서 명사어절 정보처리 과정에 관여할 수 있는 좌우반구의 정보처리에 대해 탐구하였다.
Abstract
Even though language processing is quite dissimilar on each hemisphere, it has been rarely studied what language information could be utilized to recognize Korean noun Eojeol in bilateral hemispheres. Eojeol is adequate for speculating language processing as it is a complicated lexical-unit in Korean. The purpose of this study is to investigate the functional contribution of bilateral hemispheres to visual processing on Korean noun Eojeol through visual half-field study. In this study, two experiments were performed. One is that Eojeol was presented in the central visual field, the other is that Eojeol was presented in the right or left visual field. Afterwards, the regression analysis was conducted to analyze the lexical variables that significantly affect the response time of Eojeol decision. It shows additionally significant lexical-variables in left and right visual field compared to center visual field. Tthe ‘root frequency’ variable was additionally significant in the right visual field. On the other hand, ‘number of strokes’, ‘number of syllables’, ‘number of letters’, ‘number of objective meanings’, and ‘number of subjective meanings’ variables additionally were significant in the left visual field. The reason for additionally significant lexical variables in each visual field was due to the induction of functional deficit in one hemisphere leading to primary Eojeol processing in the other hemisphere. This cognitive processing has a relation with the hemisphere-specific function of bilateral hemispheres. In conclusion, this study demonstrated the functional contribution of the bilateral hemispheres that could be involved in the language information processing of noun Eojeol through the visual half-field study.
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