Perceived shift of the centres of contracting and expanding optic flow fields: Different biases in the lower-right and upper-right visual quadrants
Perceived shift of the centres of contracting and expanding optic flow fields: Different biases in the lower-right and upper-right visual quadrants
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收缩和扩张光流场中心的感知偏移：右下和右上视觉象限的不同偏差
DOI：
10.1371/journal.pone.0211912
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发表时间：
2019-03
期刊：
影响因子：
3.7
通讯作者：
John Harris
中科院分区：
文献类型：
--
作者：
Xiaorong Cheng;Chunmiao Lou;Xianfeng Ding;Wei Liu;Xueling Zhang;Zhao Fan;John Harris
我们研究了不同区域的视野中的径向扩张和收缩模式的流动中心定位的差异。我们的研究结果表明，感知中心的周边看到的扩展模式是朝着中央凹相对于收缩模式，但只有在右下角和右上角的视觉象限，当一个单一的速度梯度与适当的整体速度的运动点的轨迹被使用。这些偏差与不同象限的视流敏感性差异无系统相关性。进一步的实验表明，偏见可能是由于两种效应的组合：有利于较低的视觉半野和半球的注意分配的不对称性有利于运动诱导的空间位移在右视觉半野的优势，全球处理。右下视觉象限中的偏差是速度梯度敏感的，并且可以通过使用多个速度梯度降低到非显著水平，这可能是由于下视觉半野在从多个速度梯度提取全局信息中的特殊作用。可能采用多个速度梯度上的整体处理，而不是单一速度梯度上的主要处理。与此相反，在右上视觉象限的感知偏差是整体速度敏感，并可以减少到一个不显着的水平与轨迹的整体速度的降低。这些结果的理解运动引起的空间错觉的影响进行了讨论。
We studied differences in localizing the centres of flow in radially expanding and contracting patterns in different regions of the visual field. Our results suggest that the perceived centre of a peripherally viewed expanding pattern is shifted towards the fovea relative to that of a contracting pattern, but only in the lower right and upper right visual quadrants and when a single speed gradient with appropriate overall speeds of the trajectories of the moving dots was used. The biases were not systematically related to differences of sensitivity to optic flow in different quadrants. Further experiments demonstrated that the biases were likely due to a combination of two effects: an advantage of global processing in favor of the lower visual hemifield and a hemispheric asymmetry in attentional allocation in favor of motion-induced spatial displacement in the right visual hemifield. The bias in the lower right visual quadrant was speed gradient-sensitive and could be reduced to a non-significant level with the usage of multiple speed gradients, possibly due to a special role of the lower visual hemifield in extracting global information from the multiple speed gradients. A holistic processing on multiple speed gradients, rather than a predominant processing on a single speed gradient, was likely adopted. In contrast, the perceived bias in the upper right visual quadrant was overall speed-sensitive and could be reduced to a non-significant level with the reduction of the overall speeds of the trajectories. The implications of these results for understanding motion-induced spatial illusions are discussed.
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影响因子：
1.4
作者：
A. Remole
通讯作者：
A. Remole
DOI：
10.1037/0096-1523.24.5.1415
发表时间：
1998-10
期刊：
Journal of Experimental Psychology: Human Perception and Performance
影响因子：
--
作者：
S. F. Pas;A. Kappers;J. Koenderink
通讯作者：
S. F. Pas;A. Kappers;J. Koenderink
影响因子：
1.8
作者：
Habak, C;Casanova, C;Faubert, JN
通讯作者：
Faubert, JN
DOI：
10.3758/bf03334927
发表时间：
1993-04
期刊：
Bulletin of the psychonomic society
影响因子：
--
作者：
S. Christman
通讯作者：
S. Christman
影响因子：
1.7
作者：
RAMACHANDRAN, VS;ANSTIS, SM
通讯作者：
ANSTIS, SM