Bischof W F, Groner M
Vision Res. 1985;25(6):839-47. doi: 10.1016/0042-6989(85)90192-0.
If a circle of random dots is presented in two successive displays in which the second is rotated in relation to the first, then observers are able to accurately discriminate the direction of apparent rotation as long as the rotation is small. Rotations beyond this short-range apparent motion can produce the impression of motion in the reverse direction. The performance in identifying the direction of rotation further depends on the eccentricity of stimulation and the density of the random dots. Simulations of the experiments using the Marr and Ullman model of motion detection are in good quantitative agreement with the data except for low dot density patterns and large displacements. In these situations perception seems to be dominated by the operation of long-range processes.
如果在两个连续的显示中呈现一组随机点组成的圆，其中第二个显示相对于第一个显示进行了旋转，那么只要旋转角度较小，观察者就能准确辨别出视旋转的方向。超出这种短程视运动的旋转会产生反向运动的印象。识别旋转方向的表现还取决于刺激的离心率和随机点的密度。使用马尔和乌尔曼运动检测模型对实验进行的模拟与数据在定量上吻合良好，但对于低点密度模式和大位移情况除外。在这些情况下，感知似乎由长程过程的运作主导。
