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当启动词与靶词在形(或音,或义)不匹配时,受试者的ERPs均出现一个较大的负相成分(N400)。在音义分类作业时,N400的潜伏期较长,波幅较大,左右两侧波幅不对称(右>左)的现象较为明显。而在字形分类作业时,N400潜伏期较短,波幅较低,左右两侧波幅无显著性差异。提示,字形加工和音、义的加工可能具有不同的脑机制。N400的潜伏期与波幅可能与对字词的加工深度有关。
When the start word and the target did not match in shape (or sound, or meaning), the subject’s ERPs showed a larger negative phase component (N400). In the semantic classification of work, N400 longer latency, larger amplitude, left and right asymmetric amplitude (right> left) is more obvious. In glyph classification operation, N400 shorter latency, lower volatility, left and right sides of the amplitude was no significant difference. Tip, glyph processing and tone, meaning processing may have different brain mechanisms. The latency and amplitude of the N400 may be related to the processing depth of words.