Tse Peter Ulric, Logothetis Nikos K
Max Planck Institute for Biological Cybernetics, Tübingen, Germany.
Percept Psychophys. 2002 Feb;64(2):244-65. doi: 10.3758/bf03195790.
Transformational apparent motion (TAM) occurs when a figure changes discretely from one configuration to another overlapping configuration. Rather than an abrupt shape change, the initial shape is perceived to transform smoothly into the final shape as if animated by a series of intermediate shapes. We find that TAM follows an analysis of form that takes 80-140 msec. Form analysis can function both at and away from equiluminance and can occur over contours defined by uniform regions as well as outlines. Moreover, the forms analyzed can be 3-D, resulting in motion paths that appear to smoothly project out from or into the stimulus plane. The perceived transformation is generally the one that involves the least change in the shape or location of the initial figure in a 3-D sense. We conclude that perception of TAM follows an analysis of 3-D form that takes approximately 100 msec. This stage of form analysis may be common to both TAM and second-order motion.
当一个图形从一种形态离散地变化为另一种重叠形态时，就会出现变换性表观运动（TAM）。不是突然的形状变化，而是初始形状被感知为平滑地变换为最终形状，就好像由一系列中间形状进行动画演示一样。我们发现，TAM遵循一种形式分析，该分析需要80 - 140毫秒。形式分析在等亮度条件下和非等亮度条件下都能起作用，并且可以发生在由均匀区域定义的轮廓以及轮廓线上。此外，所分析的形式可以是三维的，从而产生似乎从刺激平面平滑地向外投射或向内投射的运动路径。所感知到的变换通常是在三维意义上涉及初始图形形状或位置变化最小的那种变换。我们得出结论，TAM的感知遵循一种大约需要100毫秒的三维形式分析。这种形式分析阶段可能是TAM和二阶运动所共有的。
