Gogel W C
Perception. 1979;8(3):255-62. doi: 10.1068/p080255.
Induced motion is illustrated by the apparent motion imparted to a stationary disc by the horizontal motion of an enclosing frame. The present study examined the effect of frame speed, with a constant extent of frame motion, on the magnitude of induced motion for average frame speeds varying from 0.17 to 2.85 deg s-1. The induced motion was measured by two methods. (i) The observer adjusted the horizontal distance between comparison posts to indicate the extent of the horizontal induced motion in a physically stationary disc. (ii) The observer adjusted the slant of a comparison rod to indicate the apparent path of motion of the disc physically moving straight up and down in phase with the horizontal motion of the surrounding frame. The latter method requires the observer to integrate two apparent components of motion of the disc, one from its physical vertical motion and the other from its induced horizontal motion. The results from both methods show that substantial amounts of induction occurred at all of the frame speeds. The vector addition of apparent motions from real and from induced motion obtained from the second method, and the substantial amounts of induction found with the high frame speeds are interpreted to indicate that the processes underlying the perception of real and induced motion are essentially the same.
诱导运动通过一个封闭框架的水平运动赋予静止圆盘的视在运动来说明。本研究考察了在框架运动范围恒定的情况下，框架速度对平均框架速度在0.17至2.85度每秒之间变化时诱导运动大小的影响。诱导运动通过两种方法测量。（i）观察者调整比较柱之间的水平距离，以指示物理上静止圆盘中水平诱导运动的程度。（ii）观察者调整比较杆的倾斜度，以指示与周围框架水平运动同相上下直线物理运动的圆盘的视在运动路径。后一种方法要求观察者整合圆盘运动的两个视在分量，一个来自其物理垂直运动，另一个来自其诱导水平运动。两种方法的结果都表明，在所有框架速度下都发生了大量的诱导。从第二种方法获得的真实运动和诱导运动的视在运动的矢量相加，以及在高框架速度下发现的大量诱导，被解释为表明真实运动和诱导运动感知背后的过程基本相同。
