Further evidence for the division of attention among non-contiguous locations
Further evidence for the division of attention among non-contiguous locations
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DOI：
10.1080/713756781
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发表时间：
1998-03-01
期刊：
影响因子：
2
通讯作者：
Kramer, AF
中科院分区：
文献类型：
--
作者：
Hahn, S;Kramer, AF
除了少数例外，视觉注意力的模型都表明注意力被部署到视觉空间的单一区域。克雷默和卡恩（1995）最近报道，注意力比以前认为的要灵活得多，在某些情况下，注意力可能集中在视野的多个非连续区域。在这里报告的五项研究中，我们研究了在视觉空间的不同位置之间分配注意力的能力的边界条件。在每一项研究中，受试者都要完成一项相同-不同的匹配任务，目标字母出现在一组干扰字母的两侧。实验1，2和3提供了进一步的支持，我们的建议，受试者可以同时出席非连续的位置，只要新的对象不出现在出席的地区之间。实验4考察了多个注意焦点的中断是否是新物体本身或与任务无关的物体捕获注意的结果。只要目标位置之间没有出现新的干扰物，就可以保持多个注意焦点。实验5研究了注意力是否可以在半野内以及半野之间的非连续位置之间进行划分。半视野边界并没有限制受试者在视觉空间的不同区域之间分配注意力的能力。这些研究的结果进行了讨论的性质，注意力的灵活性和假定的神经解剖机制，支持我们的能力，分裂注意力之间的不同区域的视野。
Models of visual attention have, with few exceptions, suggested that attention is deployed to unitary regions of visual space. Kramer and Kahn (1995) recently reported that attention is considerably more flexible than previously believed, such that under some conditions attention may be focused on multiple non-contiguous areas of the visual field. In the five studies reported here, we examined the boundary conditions on the ability to divide attention among different locations in visual space. In each of the studies, subjects performed a same-different matching task with target letters that were presented on opposite sides of a set of distracter letters. Experiments 1, 2 and 3 provide further support for our proposal that subjects can concurrently attend to non-contiguous locations as long as new objects do not appear between the attended areas. Experiment 4 examined whether the disruption of multiple attentional foci was the result of the capture of attention by new objects per se, or by task-irrelevant objects. Multiple attentional foci could be maintained as long as new distracter objects did not appear between target locations. Experiment 5 examined whether attention can be divided among non-contiguous locations within as well as between hemifields. Hemifield boundaries did not constrain subjects' ability to divide attention among different areas of visual space. The results of these studies are discussed in terms of the nature of attentional flexibility and putative neuroanatomical mechanisms which support our ability to split attention among different regions of the visual field.