Vernier acuity of illusory contours defined by motion
Vernier acuity of illusory contours defined by motion
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DOI：
10.1167/6.9.6
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发表时间：
2006-01-01
影响因子：
1.8
通讯作者：
Chen, Vincent J.
中科院分区：
文献类型：
--
作者：
Barraza, Jose F.;Chen, Vincent J.
我们在这里提出了一系列的实验，探索一类特殊的视觉完成，它严格地与表观运动的感知联系在一起。刺激由稀疏的随机点阵列组成，其中的点保持在原位。在明显移动区域的前后边缘的点的亮度或颜色的变化在空间和时间上被整合，以产生定义良好的轮廓，形状和颜色的感知。我们测试游标的视运动定义的虚幻条的敏锐度如何取决于速度，密度和刺激配置。我们发现较高的视运动速度降低了游标灵敏度阈值。这些阈值也随着点密度的增加而降低，点的亮度变化提供了错觉轮廓感知所需的表观运动信号。在随后的实验中，我们证明了亮度定义的侧边可以无缝地与明显运动定义的轮廓整合并改善感知，降低了它们的游标阈值。
We present here a series of experiments exploring a special class of visual completion that is strictly tied to the perception of apparent motion. The stimuli consist of sparse random-dot arrays, in which dots remain in place. Changes of luminance or color of the dots at leading and trailing edges of an apparently moving region are integrated over space and time to produce the perception of well-defined contours, shapes, and color. We test how Vernier acuity of apparent motion-defined illusory bars depends on speed, density, and stimulus configurations. We found that higher speed of apparent motion reduces the Vernier acuity thresholds. These thresholds also decrease with increasing density of dots, whose luminance changes provide the apparent motion signal required for the perception of illusory contours. In subsequent experiments, we showed that luminance-defined flankers could seamlessly integrate with and improve the perception of apparent motion-defined contours, reducing their Vernier thresholds.