The Wandering Circles: A Flicker Rate and Contour-Dependent Motion Illusion
The Wandering Circles: A Flicker Rate and Contour-Dependent Motion Illusion
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DOI：
10.1177/2041669519875156
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发表时间：
2019-09-01
期刊：
影响因子：
1.9
通讯作者：
Caplovitz, Gideon P.
中科院分区：
文献类型：
--
作者：
Blair, Christopher D.;Erlikhman, Gennady;Caplovitz, Gideon P.
对视觉系统的理解可以通过检查感知中的错误来获得信息。我们提出了一种新的错觉-漫游圆-其中静止的圆经历了对比极性反转（即闪烁），当从外围观察时，似乎以随机的方式移动。在两个心理物理实验中，参与者在不同的刺激条件下对感知到的虚幻运动的强度进行打分。当圆的边缘由明暗交替定义时，当边缘平滑地褪为背景灰色时（即Craik-O'Brien-Cornsweet错觉的圆形排列），错觉运动感知最强。此外，错觉运动的感知与闪烁速率有关，当圆极性反转每秒9.44次时，错觉运动的感知最强，每秒1.98次时，错觉运动的感知最弱。徘徊的圆圈不同于许多其他经典的运动幻觉，因为光/暗交替在时间和位置上完美地平衡在圆圈的边缘，因此，在刺激中没有净定向的局部或全局运动能量。感知到的运动可能依赖于观看者内部的因素，如自上而下的影响、亮度和视网膜运动感知的不对称性、由于周边观看、眼球运动或低对比度边缘而导致的位置不确定性的适应。
Understanding of the visual system can be informed by examining errors in perception. We present a novel illusion-Wandering Circles-in which stationary circles undergoing contrast-polarity reversals (i.e., flicker), when viewed peripherally, appear to move about in a random fashion. In two psychophysical experiments, participants rated the strength of perceived illusory motion under varying stimulus conditions. The illusory motion percept was strongest when the circle's edge was defined by a light/dark alternation and when the edge faded smoothly to the background gray (i.e., a circular arrangement of the Craik-O'Brien-Cornsweet illusion). In addition, the percept of illusory motion is flicker rate dependent, appearing strongest when the circles reversed polarity 9.44 times per second and weakest at 1.98 times per second. The Wandering Circles differ from many other classic motion illusions as the light/dark alternation is perfectly balanced in time and position around the edges of the circle, and thus, there is no net directional local or global motion energy in the stimulus. The perceived motion may instead rely on factors internal to the viewer such as top-down influences, asymmetries in luminance and motion perception across the retina, adaptation combined with positional uncertainty due to peripheral viewing, eye movements, or low contrast edges.