The footprints of visual attention in the Posner cueing paradigm revealed by classification images
The footprints of visual attention in the Posner cueing paradigm revealed by classification images
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DOI：
10.1167/2.1.3
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发表时间：
2002-01-01
影响因子：
1.8
通讯作者：
Abbey, Craig K.
中科院分区：
文献类型：
--
作者：
Eckstein, Miguel P.;Shimozaki, Steven S.;Abbey, Craig K.
在波斯纳提示范式中，在目标出现在提示位置的试验中，观察者在检测目标方面的表现通常比在目标出现在未提示位置的试验中更好。这种效应可以用贝叶斯观察者来解释，其中视觉注意力只是在有提示（有人参与）和无提示（无人参与）位置对信息进行不同的加权，而不改变每个位置的处理质量。或者，也可以用视觉注意力改变提示位置处感知过滤器的形状来解释。在本研究中，我们使用分类图像技术来比较对比度辨别任务中有提示和无提示位置的人类感知滤波器。我们没有发现两个位置的推断感知过滤器的形状之间存在统计上的显着差异，观察到的差异也没有解释人类观察者中测量到的提示效应。相反，我们发现分类图像的大小存在差异，这支持了这样的观点：视觉注意会改变有提示和无提示位置的信息权重，但不会改变每个单独位置的处理质量。
In the Posner cueing paradigm, observers' performance in detecting a target is typically better in trials in which the target is present at the cued location than in trials in which the target appears at the uncued location. This effect can be explained in terms of a Bayesian observer where visual attention simply weights the information differently at the cued (attended) and uncued (unattended) locations without a change in the quality of processing at each location. Alternatively, it could also be explained in terms of visual attention changing the shape of the perceptual filter at the cued location. In this study, we use the classification image technique to compare the human perceptual filters at the cued and uncued locations in a contrast discrimination task. We did not find statistically significant differences between the shapes of the inferred perceptual filters across the two locations, nor did the observed differences account for the measured cueing effects in human observers. Instead, we found a difference in the magnitude of the classification images, supporting the idea that visual attention changes the weighting of information at the cued and uncued location, but does not change the quality of processing at each individual location.