事件相关电位N2与视觉类别特征加工

摘要

本文探讨在第二语言学习中大脑如何在语义激活之前分别将不同语言输入不同的表征系统这一问题。实验结果表明：在200~300ms内,真字和假字比字母诱发的N2波幅更大。N2可能反映了刺激的类别特征加工,这种类别特征加工能分别分析相同类别的刺激并且区分不同的刺激。%The present study investigated this question using a silent reading task in which Latin letters and simple Chinese characters appeared randomly for 100 milliseconds（ms）.The results showed that real Chinese characters and pseudocharacters produced a larger N2 response than letters within 200-300ms time window.The category feature processing of stimuli might be responsible for the N2 response;the processing allows stimuli of the same category to be analyzed in their specific units and distinguishes different stimuli.