横向平行线段错觉的事件相关电位研究

his research discovered the illusion of horizontal parallel lines: the upward one of two same horizontal parallel lines is perceived longer. With the advance of event-related potential, we investigate its neuropsychology mechanisms. Study one forced subjects to choose the longer line between twohorizontal parallel lines and we discovered when lines were same long,62.8% (more than 50%)subjects perceived the upward one longer. Study two used event-related potential,according to reaction rate we divided subjects into high/low illusion group,and discovered high illusion group's latency of P100 in occipital region(O2、PO6、PO8) are significantly delayed, the latency of N150 in frontal area(F2、FC4、FC6), however, are significantly advanced. Thus, we inferred that illusion not only expresses in early stage of vision, it is also relevant to the cognitive process.