Delayed working memory consolidation during the attentional blink
Delayed working memory consolidation during the attentional blink
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DOI：
10.3758/bf03196329
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发表时间：
2002-12-01
影响因子：
3.5
通讯作者：
Luck, SJ
中科院分区：
文献类型：
--
作者：
Vogel, EK;Luck, SJ
在快速视觉刺激流中检测到目标 (T1) 后，有 400600 毫秒的时间段，在此期间会错过后续目标 (T2)。这种表现受损被称为注意力瞬脱。最近的理论提出注意力。眨眼反映了工作记忆巩固中的瓶颈，使得在 T1 巩固之前 T2 无法得到巩固，因此，如果在 T1 巩固期间出现 T2，则 T2 会被随后的刺激所掩盖。为了支持这一解释，Giesbrecht & Di Lollo (1998) 发现，当 T2 是刺激流中的最后一个项目时，不会观察到注意眨眼，因为没有后续刺激可能会掩盖 T2。为了对注意力眨眼的解释进行直接测试，在本研究中，我们使用事件相关电位波形的 P3 分量来跟踪 T2 的处理。当T2后面跟着一个掩蔽项目时，我们发现P3波在注意眨眼期间被完全抑制，表明T2在工作记忆中没有得到巩固。然而，当T2是刺激流中的最后一项时，我们发现P3波被延迟但未被抑制，这表明T2盘整并没有被消除而只是被延迟。这些结果与工作记忆中信息整合的基本限制是一致的。
After the detection of a target (T1) in a rapid stream of visual stimuli, there is a period of 400600 msec during which a subsequent target (T2) is missed. This impairment in performance has been labeled the attentional blink. Recent theories propose that the attentional. blink reflects a bottleneck in working memory consolidation such that T2 cannot be consolidated until after T1 is consolidated, and T2 is therefore masked by subsequent stimuli if it is presented while T1 is being consolidated. In support of this explanation, Giesbrecht & Di Lollo (1998) found that when T2 is the final item in the stimulus stream, no attentional blink is observed, because there are no subsequent stimuli that might mask T2. To provide a direct test of this explanation of the attentional blink, in the present study we used the P3 component of the event-related potential waveform to track the processing of T2. When T2 was followed by a masking item, we found that the P3 wave was completely suppressed during the attentional blink period, indicating that T2 was not consolidated in working memory. When T2 was the last item in the stimulus stream, however, we found that the P3 wave was delayed but not suppressed, indicating that T2 consolidation was not eliminated but simply delayed. These results are consistent with a fundamental limit on the consolidation of information in working memory.