Attentional enhancement during multiple-object tracking.
Attentional enhancement during multiple-object tracking.
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DOI：
10.3758/pbr.16.2.411
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发表时间：
2009-04
影响因子：
3.5
通讯作者：
Vogel EK
中科院分区：
文献类型：
--
作者：
Drew T;McCollough AW;Horowitz TS;Vogel EK
注意力在多目标跟踪中的作用是什么？注意力是增强了目标表征，抑制了分心表征，还是两者兼而有之？在不改变人们试图衡量的注意力分配的情况下，很难在纯粹的行为范式中提出这个问题。在本研究中，我们使用事件相关电位来检测对任务无关探测的早期视觉诱发反应，而不需要额外的检测任务。受试者在四个移动干扰物和四个固定干扰物中跟踪了两个目标。短暂的探测器被闪现在目标、移动的干扰物、静止的干扰物或空白空间上。我们获得了视觉诱发的P1和N1成分的显著增强(~100-150毫秒)的目标，相对于干扰物。此外，好的跟踪器比差劲的跟踪器显示出目标探测器和分心探测器之间的差异更大。这些结果为跟踪目标项的早期注意增强提供了证据，也为测量跟踪过程中的注意分配提供了一种新的方法。
What is the role of attention in multiple-object tracking? Does attention enhance target representations, suppress distractor representations, or both? It is difficult to ask this question in a purely behavioral paradigm without altering the very attentional allocation one is trying to measure. In the present study, we used event-related potentials to examine the early visual evoked responses to task-irrelevant probes without requiring an additional detection task. Subjects tracked two targets among four moving distractors and four stationary distractors. Brief probes were flashed on targets, moving distractors, stationary distractors, or empty space. We obtained a significant enhancement of the visually evoked P1 and N1 components (~100–150 msec) for probes on targets, relative to distractors. Furthermore, good trackers showed larger differences between target and distractor probes than did poor trackers. These results provide evidence of early attentional enhancement of tracked target items and also provide a novel approach to measuring attentional allocation during tracking.