【作者】 陈瀛； 张明；

【Author】 Chen Ying Zhang Ming Department of psychology in Northeast Normal University,5268 Renmin Street, Changchun,Jilin Province,PRC,130024,

【机构】 东北师范大学心理学系；

【摘要】 采用ERP技术,在RSVP范式下探讨注意瞬脱的短时加工机制,对20名大学生在注意识别任务中的P300成分进行考察。实验通过控制变化分心物与目标刺激的特征关系(一致、带有部分目标特征、不一致)及其位置(lag1、lag2)来考察P300成分潜伏期与振幅的相应变化,被试的任务是从连续快速呈现的黑色英文字母中觉察到红色数字并报告出来。结果发现:在两种呈现位置条件下,带有目标特征的分心物(TD)引发的P300振幅均显著低于目标特征一致条件(T);变化分心物位置为lag2时,带有目标特征的分心物(TD)引发的P300潜伏期显著晚于目标特征一致条件(T),变化分心物位置为lag1时,两种条件没有显著差异。实验结果表明注意瞬脱是注意的目标控制及对随后刺激的注意反应环路延迟所致,支持了推动反弹理论。更多还原

【Abstract】 Examine short-term processing mechanism of attentional blink in RSVP paradigm by using ERP technology,and analyzed the P300 composition of attention task for 20 college students.Investigate the change of latency and amplitude of P300 component by manipulating the distracters’ feature range to target and the position to T1.The task is report the red numbers from rapidly presented black English letters.The results show that in the both position conditions,the amplitude of P300 evoked by distracters with target features(TD)is significant lower than that evoked by target stimulus(T);Change the position of distracter to lag2,the distraction with a target features(TD) were significantly late than target characteristics consistent conditions(T) in incubation period of P300.Change the position of distracter to lagl,there was no significant difference between the two conditions.The results show that attentional blink as a result of attention control and a delay response to later stimulus support the boost and bounce theory.更多还原