Two noncontiguous locations can be attended concurrently: Evidence from the attentional blink
Two noncontiguous locations can be attended concurrently: Evidence from the attentional blink
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DOI：
10.3758/bf03193968
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发表时间：
2006-08-01
影响因子：
3.5
通讯作者：
Yamada, Yula
中科院分区：
文献类型：
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作者：
Kawahara, Jun-Ichiro;Yamada, Yula
当两个目标（T1 和 T2）插入快速的视觉干扰源 (RSVP) 流中时，T2 的检测/识别精度会因目标间延迟短于约 500 毫秒而受到损害。这种现象，即注意力瞬脱（AB），被认为是视觉系统无法处理多个项目的标志。然而，矛盾的是，当 T2 直接在 T1 之后出现时，AB 会大大降低（称为 lag-1 保留）。因为据说 lag-1 保留取决于设置为处理第一个目标的观察者的空间注意力，所以我们预测，如果将观察者设置为监视两个 RSVP 流，他们可以处理两个以上的项目；也就是说，将同时获得两个 lag-1 备用实例。三个实验的结果表明情况确实如此。当观察者在两个同步 RSVP 流中的每一个中搜索两个目标时，两个流中同时发生滞后 1 备用。这些结果表明，在 RSVP 情况下，视觉系统可以同时处理最多四个项目。
When two targets (T1 and T2) are inserted in a rapid stream of visual distractors (RSVP), detection/identification accuracy of T2 is impaired at intertarget lags shorter than about 500 msec. This phenomenon, the attentional blink (AB), has been regarded as a hallmark of the inability of the visual system to process multiple items. Yet, paradoxically, the AB is much reduced when T2 is presented directly after T1 (known as lag-1 sparing). Because lag-1 sparing is said to depend on observers' spatial attention being set to process the first target, we predicted that if observers are set to monitor two RSVP streams, they could process more than two items; that is, two instances of lag-1 sparing would be obtained concurrently. The results of three experiments indicated that this was the case. When observers searched for two targets in each of two synchronized RSVP streams, lag-1 sparing occurred concurrently in both streams. These results suggest that the visual system can handle up to four items at one moment under RSVP circumstances.