What determines the perceived speed of dots moving within apertures?
What determines the perceived speed of dots moving within apertures?
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DOI：
10.1007/s002210100848
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发表时间：
2001-11-01
影响因子：
2
通讯作者：
Zanker, JM
中科院分区：
文献类型：
--
作者：
Ryan, J;Zanker, JM
虽然这是一个众所周知的事实，物体似乎在较小的刺激场移动得更快，这种速度误判的原因仍然是一个争论的问题。我们提出了四个实验来验证刺激参数，这些参数对小孔径后面移动的点的表观速度增加很重要。在这些实验中，我们改变了光圈的大小和形状及其在视野中的位置，以及刺激持续时间。我们报告说，字段大小的效果并不依赖于刺激的整体持续时间，这确实会影响显示器中的单个点的典型路径长度。然而，它受到孔径形状的影响，因此沿着运动路径的孔径大小对于速度误判至关重要。，视野大小效应还取决于刺激在视野中的位置。我们的综合结果最好被描述为增加感知速度，这是一贯引起时，运动汇，即消失的点的边界，位于靠近中央凹。这种描述的相关刺激参数进行了讨论，相对于可能的高层次的机制，涉及到经典的完形心理学解释的字段大小的效果，并相对于众所周知的方面，可能是速度知觉和运动整合的神经元处理。
Whereas it is a well known fact that objects appear to move faster in smaller stimulus fields, the reason for such a misjudgement of speed is still a matter of debate. We present four experiments to characterise the stimulus parameters that are important for the apparent speed increase of dots moving behind small apertures. In these experiments we varied the size and the shape of the aperture and its location in the visual field, as well as the stimulus duration. We report that the field-size effect does not depend on the overall duration of the stimulus, which does influence the typical path length of individual dots in the display. It is, however, affected by the shape of the aperture in such a way that the aperture size along the motion path is crucial for the speed misjudgement., The field-size effect furthermore depends on the location of the stimulus in the visual field. Our combined results are best described as an increase in perceived speed that is consistently elicited when a motion sink, i.e. a boundary of disappearing dots, is located close to the fovea. Such a description of the relevant stimulus parameters is discussed with respect to possible high-level mechanisms, relating back to classic Gestalt psychology explanations of the field-size effect, and with respect to well-known aspects of neuronal processing that may underlie speed perception and motion integration.