在数字stroop范式中中文数字的物理信息和数字信息之间的ERP时程交互作用

采用事件相关电位(ERP)技术探讨了在数字stroop范式中中文数字的物理信息和数字信息的交互作用电生理基础.结果发现,在任务出现后的250 ms左右,在数字大小判断任务和物理大小判断任务中,不一致条件(数字大小与物理大小不一致)比一致条件(数字大小与物理大小一致)诱发的ERP有一个更加负向的偏移(N250);随后,在300～450 ms内,在数字大小判断任务和物理大小判断任务中,在大脑头皮顶部诱发明显的P300,且一致条件比不一致条件诱发的P300更正.因此我们的研究表明中文数字的物理信息和数字信息的冲突主要发生在比较阶段.

Abstract：

Event-related brain potentials(ERPs)were used to explore the electrophysiologic correlates of interaction between physical and numerical dimensions of Chinese word numbers in the numerical stroop paradigm.Results showed that Incongruent condition elicited a more negative ERP deflection at around 250 ms(N250)than did Congruent condition in both the numerical and physical tasks.Then,between 300～450 ms,there was an apparent P300over the parietal scalp and it was more positive in Congruent condition than in Incongruent condition in both the numerical and physical tasks.

The Timing of Interaction Between Physical and Numerical Dimensions of Chinese Word Numbers in the Numerical Stroop Paradigm