Department of Psychology, Ludwig Maximilian University, Munich, Germany.
Psychophysiology. 2010 Nov;47(6):1134-41. doi: 10.1111/j.1469-8986.2010.01033.x.
An increase in concurrent working memory load has been shown to amplify the attentional blink. The present study investigated the temporal locus of this phenomenon, by using a dual rapid serial visual presentation paradigm that enabled the measurement of lateralized event-related potentials. The P3 component was shown to be affected by both working memory load and the lag between the target stimuli, consistent with current models of temporal attention and a functional explanation of the P3 in terms of memory consolidation. P3 amplitude was reduced for short target lags and high memory loads. The P2 component was affected by lag only, and not memory load. Importantly, the N2pc component was modulated also by both lag and memory load. The results showed that early attentional processing (as marked by the N2pc) was suppressed by increased involvement of working memory, a phenomenon not well predicted by many current theories of temporal attention.
增加同时工作记忆负荷已被证明会放大注意瞬脱。本研究通过使用双快速序列视觉呈现范式来研究这种现象的时间位置，该范式允许测量偏侧事件相关电位。P3 成分受到工作记忆负荷和目标刺激之间的滞后的影响，与时间注意的当前模型以及根据记忆巩固对 P3 的功能解释一致。对于短目标滞后和高记忆负荷，P3 振幅降低。P2 成分仅受滞后影响，不受记忆负荷影响。重要的是，N2pc 成分也受到滞后和记忆负荷的调节。结果表明，工作记忆的参与度增加会抑制早期注意力处理（如 N2pc 标记），这一现象不能被许多当前的时间注意理论很好地预测。
