ISSN : 1226-9654
Morphemes are combinations of meanings, grammatical information, and linguistic forms like orthographic and phonological components. This study aims to verify the priming pattern index of morpheme-specific independent Event-related potentials(ERPs), which differ from semantic and orthographic components. We conducted a priming lexical decision study comparing a morphologically related(e.g. 날계란-날고기), semantically related(e.g. 번데기-애벌레), orthographically related(e.g. 통신기-통나무) and unrelated control condition(e. g. 광역시-개죽음) with 57ms SOA(Stimulus Onset Asynchrony). The behavioral data showed the facilitatory priming effect only in the morphologically related condition, but not in the semantically and orthographically related conditions. In comparison with the unrelated condition, N250, N400, and P600 components were indicated significant in the ERP data. For the N250 ERP component, all three related primes produced a significantly less negative amplitude compared to the ones from unrelated primes. Moreover, the morphologically related primes caused the least negativity. For the N400 ERP component, the morphologically related condition had shown similar aspects as the semantically related condition. However, the morphologically related condition showed only meaningful amplitude difference clearly compared to the unrelated condition. In the case of the P600 ERP component, the morphologically related condition presented a contrast to semantically, orthographically, and unrelated conditions. Overall, it appeared that there had been three information processing steps in the morphological processing. This result implicates that the semantic and orthographic components of the morphemes occur in the early processes, including N250 and N400, and the other components, such as derivational and other grammatical information; these are reflected in the late process of P600.
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