인지과학 (Korean Journal of Cognitive Science)

한국인지과학회 (The Korean Society for Cognitive Science)
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의미 투명성이 단어 학습에 미치는 영향: 사건관련전위 연구

Semantic transparency effects in the learning of new words: An ERP study

  • 투고 : 2016.09.27
  • 심사 : 2016.09.27
  • 발행 : 2016.09.30
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초록

새로운 한자합성어의 학습에서 의미 투명성의 효과를 행동 실험과 ERP 실험을 통해 조사하였다. 참가자들은 구성형태소와 단어 의미의 관계가 투명한 조건(=투명 신단어)과 불투명한 조건(=불투명 신단어)에서 3회기에 걸쳐 새로운 단어-의미쌍을 학습하였다. 학습 단계에서는 자기 조절 의미 학습 시간과 ERP를 측정하고, 검사 단계에서는 학습한 단어에 대한 어휘판단시간과 의미 회상 점수를 측정하였다. 의미 학습 시간, 어휘판단, 의미 회상 검사 모두에서 의미 투명성의 효과가 유의하게 나타났다. 투명 신단어의 경우, 불투명 신단어에 비해 의미 학습 시간이 더 짧았음에도 불구하고, 어휘판단이 더 정확하고 빨랐으며, 의미 회상 검사 수행이 더 좋았다. 의미 투명성 효과는 ERP의 N400 성분의 진폭에서도 나타났다. 단어 의미가 투명한 조건에 비해 불투명한 조건에서의 N400 진폭이 더 컸다. 본 연구의 결과는 단어 재인 연구에서 발견된 의미 투명성 효과가 단어 학습에서도 나타남을 보여주며, 이는 단어 학습에서 형태소 정보가 중요한 역할을 한다는 것을 시사한다.

The present study investigates the effects of semantic transparency on the learning of new words using both behavioral measures and event-related brain potentials. Participants studied novel words with either semantically transparent or opaque definitions while their brain potentials were recorded. Learning performance was assessed with both a lexical decision task and a recall test. The results indicated that transparent novel words were easier to learn than opaque words. More specifically, self-paced learning times were shorter for transparent novel words across three study sessions. Transparent words also elicited reduced N400s compared with opaque words in all sessions. Moreover, lexical decisions to both learned novel words and real words were faster and more accurate within the transparent condition compared to the opaque condition. These results suggest that semantic transparency also plays an important role within word learning, just as within word recognition, further supporting the notion that morphological information is critical within lexical processing.

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