VISUAL-ATTENTION AND PERCEPTUAL GROUPING
VISUAL-ATTENTION AND PERCEPTUAL GROUPING
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DOI：
10.3758/bf03209145
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发表时间：
1992-09-01
期刊：
影响因子：
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通讯作者：
BRAUN, J
中科院分区：
文献类型：
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作者：
BENAV, MB;SAGI, D;BRAUN, J
知觉组织被认为包括对纹理不连续和知觉分组的分析。在早期的工作中，我们发现即使视觉注意力在其他地方，也能正常地检测到纹理的不连续性。在这里，我们报告了当视觉注意被并发的视觉任务所参与时，知觉分组是如何受到影响的。为了引出感知分组，我们使用了基于接近性和相似性的格式塔分组演示。调查了四项任务，一些要求观察者区分水平和垂直分组，一些要求观察者仅仅检测分组的存在或不存在。视觉注意力在显示的中心被一项形式识别任务所吸引。纹理不连续性的检测作为一项控制任务。并发表单识别与所有四个分组任务相冲突，导致每种情况下分组性能的显著降低。当形式识别或分组识别与纹理不连续性检测相结合时，没有观察到性能降低。这些结果表明，感知分组和形式识别争夺视觉注意力，而纹理不连续性的检测则没有。
Perceptual organization is thought to involve an analysis of both textural discontinuities and perceptual grouping. In earlier work, we found that textural discontinuities were detected normally even when visual attention was engaged elsewhere. Here we report how perceptual grouping is affected when visual attention is engaged by a concurrent visual task. To elicit perceptual grouping, we used the Gestalt demonstrations of grouping on the basis of proximity and of similarity. Four tasks were investigated, some requiring the observer to discriminate between horizontal and vertical grouping, and some requiring the observer to merely detect the presence or absence of grouping. Visual attention was engaged at the center of the display by a form identification task. The detection of a textural discontinuity served as a control task. Concurrent form identification conflicted with all four grouping tasks, resulting in a significant reduction of grouping performance in each case. No performance reduction was observed when either form identification or grouping discrimination was combined with the detection of a textural discontinuity. These results suggest that perceptual grouping and form identification compete for visual attention, whereas the detection of a textural discontinuity does not.