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大脑词库中的基本语言单位问题是神经语言学界一直存在争议的问题。本文利用事件相关电位技术(ERPs),通过“学习-再认”实验范式,考察了词、非自由语素和无意义字三类单音节语言单位的记忆编码加工特点,探讨了汉语大脑词库中存储的基本语言单位问题。实验结果显示,在第二个正成分(P2)上,词的波幅比非自由语素大,非自由语素的N400成分波幅比词和无意义字的更大,词和无意义字的晚正成分(LPC)波幅比非自由语素更大。文章得出结论,词更有可能以独立形式存储,因而更有可能成为人脑中的基本语言单位。
The basic unit of speech in the brain lexicon has always been a controversial issue in the neuroscience community. In this paper, by using “Event-related Potential Techniques” (ERPs), we investigate the memory coding features of three types of monosyllabic units of words, non-free morphemes and nonsense words through the experimental paradigm of "learning- The basic language unit stored in the library. The experimental results show that on the second positive component (P2), the amplitude of the word is larger than that of the non-free morpheme, the N400 component of the non-free morpheme is larger than the word and the meaningless word, and the late positive component of the word and the meaningless word (LPC) amplitude is greater than non-free morpheme. The article concludes that words are more likely to be stored in an independent form and therefore more likely to be the basic language unit in the human brain.