Rotman Research Institute, Baycrest Centre for Geriatric Care, 3560 Bathurst Street, Toronto, ON, M6A 2E1, Canada.
Exp Brain Res. 2011 Dec;215(3-4):285-92. doi: 10.1007/s00221-011-2897-3. Epub 2011 Oct 15.
Attentional blink (AB) refers to a phenomenon where the correct identification of a first target (i.e., target) impairs the processing of a second target (i.e., probe) nearby in time. In the present study, we investigate the influence of temporal attention on auditory AB by means of scalp-recorded event-related potentials. Participants were instructed to focus their attention on a particular time interval following the target (i.e., short, middle, or long temporal position) in order to detect the occurrence of the probe in a rapid series of distractor sounds. We found a large probe processing deficit when the probe occurred immediately after the target. This AB decreased as the time interval between the target and the probe increased and coincided with the generation of a positive wave at parietal sites (i.e., P3b). The P3b elicited by the probe peaked earlier when the probe occurred at the designated time than when it occurred at another position in time. The results indicate that temporal attention can be deployed to a particular time, which facilitates short-term consolidation of the probe.
注意瞬脱（Attentional Blink，AB）指的是这样一种现象，即对第一个目标（即靶刺激）的正确识别会损害附近第二个目标（即探测刺激）的加工。在本研究中，我们通过头皮记录的事件相关电位来研究时间注意对听觉 AB 的影响。参与者被指示将注意力集中在目标之后的特定时间间隔（即短、中或长时间位置），以便在快速呈现的分散声音中检测到探测刺激的出现。当探测刺激紧随目标出现时，我们发现探测刺激的加工存在很大的缺陷。随着目标和探测刺激之间的时间间隔增加，AB 逐渐减小，同时在顶叶区域产生一个正波（即 P3b）。当探测刺激出现在指定时间时，其引发的 P3b 比出现在其他时间位置时更早达到峰值。研究结果表明，时间注意可以被分配到特定的时间，这有助于探测刺激的短期巩固。
