The lawful perception of apparent motion
The lawful perception of apparent motion
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DOI：
10.1167/7.8.9
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发表时间：
2007-01-01
影响因子：
1.8
通讯作者：
Kubovy, Michael
中科院分区：
文献类型：
--
作者：
Gepshtein, Sergei;Kubovy, Michael
视觉表观运动是从分离的空间位置的连续刺激的运动的经验。空间距离和时间距离如何相互作用以确定视运动的强度一直存在争议。一些研究报告了时空耦合：如果我们增加连续刺激之间的空间或时间距离，我们也必须增加它们之间的其他距离，以保持恒定的明显运动强度（科特第三运动定律）。其他研究报告了时空权衡：如果我们增加其中一个距离，我们必须减少另一个以保持恒定的视运动强度。在这篇文章中，我们解决了争议。从运动测量的规范理论和人类时空敏感性数据出发，我们推测耦合和权衡都应该发生，但速度不同。我们确认预测在两个实验中，使用阈上多稳态视在运动显示器称为运动晶格。我们的研究结果表明，作为速度的函数的权衡和耦合之间的平滑过渡：权衡发生在低速和耦合发生在高速。从我们的数据中，我们重建的阈上等值线，类似于在阈值的可见性等灵敏度轮廓。
Visual apparent motion is the experience of motion from the successive stimulation of separate spatial locations. How spatial and temporal distances interact to determine the strength of apparent motion has been controversial. Some studies report space-time coupling: If we increase spatial or temporal distance between successive stimuli, we must also increase the other distance between them to maintain a constant strength of apparent motion (Korte's third law of motion). Other studies report space-time tradeoff: If we increase one of these distances, we must decrease the other to maintain a constant strength of apparent motion. In this article, we resolve the controversy. Starting from a normative theory of motion measurement and data on human spatiotemporal sensitivity, we conjecture that both coupling and tradeoff should occur, but at different speeds. We confirm the prediction in two experiments, using suprathreshold multistable apparent-motion displays called motion lattices. Our results show a smooth transition between the tradeoff and coupling as a function of speed: Tradeoff occurs at low speeds and coupling occurs at high speeds. From our data, we reconstruct the suprathreshold equivalence contours that are analogous to isosensitivity contours obtained at the threshold of visibility.