Department of Psychology, University of Groningen, Groningen, The Netherlands.
Psychophysiology. 2012 Jul;49(7):885-98. doi: 10.1111/j.1469-8986.2012.01380.x. Epub 2012 May 7.
The deployment of attention during temporal integration was investigated with event-related potentials. Attentional selection of an integrated percept and an actual singleton were examined. Integration performance was related to modulations of the N2pc, N2, and P3 components. Singleton localization performance was reflected in N2pc and P3 only. Of note, the singleton N2pc developed and subsided earlier than the integration N2pc. The singleton P3 seemed to develop in a single deflection, while the integration P3 showed two more distinct deflections. Physical stimulus differences could not explain these results. The N2pc and N2 modulations showed that attending to an integrated percept is not slower per se, but does differ from attending to a singleton. Integrated percepts furthermore have special correlates in late stages of perception (i.e., the P3). These differences are linked to the unique demand to combine and represent successive stimuli.
运用事件相关电位研究了时间整合期间注意力的分配。本文考察了对整合知觉和实际单一刺激的注意选择。整合表现与 N2pc、N2 和 P3 成分的调制有关。单一刺激定位表现仅反映在 N2pc 和 P3 上。值得注意的是，单一刺激 N2pc 的发展和消退比整合 N2pc 更早。单一刺激 P3 似乎只表现出一个单一的偏转，而整合 P3 则表现出两个更为明显的偏转。物理刺激差异无法解释这些结果。N2pc 和 N2 的调制表明，关注整合知觉本身并不慢，但与关注单一刺激确实不同。此外，整合知觉在感知的后期阶段（即 P3）具有特殊的相关性。这些差异与结合和表示连续刺激的独特要求有关。
