Shechter S, Hochstein S, Hillman P
Institute of Life Sciences, Hebrew University of Jerusalem, Israel.
Vision Res. 1988;28(9):1013-21. doi: 10.1016/0042-6989(88)90078-8.
Apparent motion is perceived when two spots of light are presented successively in different locations. When more than one element is present in each frame, there is a correspondence problem in matching the elements in one frame with those in the other. We report the effects of shape similarity and distance disparity on the correspondence process. Twenty subjects were tested using a 2-AFC design. We found that both shape and distance cues are used by the correspondence process: when distance is the only cue the motion which is usually perceived is that involving the shorter distance; when shape is the only cue the motion involving two elements of the same shape is preferred. We also studied the interaction between the two cues when both were present. Quantitative measures of the relative strengths of these effects and of their interaction are reported. A Signal Detection Theory model is used to analyze these apparent motion correspondence effects.
当两个光点在不同位置相继呈现时，会产生表观运动。当每一帧中存在多个元素时，在将一帧中的元素与另一帧中的元素进行匹配时会出现对应问题。我们报告了形状相似性和距离差异对对应过程的影响。使用二项迫选设计对20名受试者进行了测试。我们发现对应过程同时使用了形状和距离线索：当距离是唯一线索时，通常感知到的运动是涉及较短距离的运动；当形状是唯一线索时，涉及相同形状的两个元素的运动更受青睐。我们还研究了两种线索同时存在时它们之间的相互作用。报告了这些效应及其相互作用的相对强度的定量测量结果。使用信号检测理论模型来分析这些表观运动对应效应。
