Vogel E K, Luck S J, Shapiro K L
Department of Psychology, University of Iowa, Iowa City 52242-1407, USA.
J Exp Psychol Hum Percept Perform. 1998 Dec;24(6):1656-74. doi: 10.1037//0096-1523.24.6.1656.
When an observer detects a target in a rapid stream of visual stimuli, there is a brief period of time during which the detection of subsequent targets is impaired. In this study, event-related potentials (ERPs) were recorded from normal adult observers to determine whether this "attentional blink" reflects a suppression of perceptual processes or an impairment in postperceptual processes. No suppression was observed during the attentional blink interval for ERP components corresponding to sensory processing (the P1 and N1 components) or semantic analysis (the N400 component). However, complete suppression was observed for an ERP component that has been hypothesized to reflect the updating of working memory (the P3 component). Results indicate that the attentional blink reflects an impairment in a postperceptual stage of processing.
当观察者在快速的视觉刺激流中检测到一个目标时，会有一段短暂的时间，在此期间对后续目标的检测会受到损害。在本研究中，记录了正常成年观察者的事件相关电位（ERP），以确定这种“注意瞬脱”是反映了感知过程的抑制还是感知后过程的损害。在注意瞬脱间隔期间，未观察到与感觉处理（P1和N1成分）或语义分析（N400成分）相对应的ERP成分受到抑制。然而，对于一个被假设为反映工作记忆更新的ERP成分（P3成分），观察到了完全抑制。结果表明，注意瞬脱反映了处理过程中感知后阶段的损害。
