Hecht H, Proffitt D R
University of Virginia, Charlottesville 22903-2477.
J Exp Psychol Hum Percept Perform. 1991 Nov;17(4):1090-103. doi: 10.1037//0096-1523.17.4.1090.
Five experiments were designed to investigate the influence of three-dimensional (3-D) orientation change on apparent motion. Projections of an orientation-specific 3-D object were sequentially flashed in different locations and at different orientations. Such an occurrence could be resolved by perceiving a rotational motion in depth around an axis external to the object. Consistent with this proposal, it was found that observers perceived curved paths in depth. Although the magnitude of perceived trajectory curvature often fell short of that required for rotational motions in depth (3-D circularity), judgments of the slant of the virtual plane on which apparent motions occurred were quite close to the predictions of a model that proposes circular paths in depth.
设计了五个实验来研究三维（3-D）方向变化对似动的影响。一个特定方向的3-D物体的投影在不同位置和不同方向上依次闪烁。通过感知围绕物体外部轴的深度旋转运动，可以解决这种情况。与这一观点一致的是，发现观察者感知到了深度上的弯曲路径。尽管感知到的轨迹曲率大小往往低于深度旋转运动所需的曲率（3-D圆形度），但对似动发生的虚拟平面倾斜度的判断与提出深度圆形路径的模型预测相当接近。
