Micella F, Pinna B
Dipartimento di Psicologia Generale, Università di Padova, Italy.
Perception. 1987;16(1):61-72. doi: 10.1068/p160061.
Subject-relative explanations of motion induction state that induced motion is the result of a misperceived shift of the median plane of the visual field of the subject. This theory does not require relative motion of the spot and frame, in the classical spot-and-frame condition, only asymmetrical stimulation. Three experiments are reported in which stroboscopic induced motion was investigated. The experimental arrangement was unconventional in that the induced object (spot) was presented only during the interstimulus interval between the exposures of the inducing object (frame). This allowed differentiation of the duration of the induced movement and that of the inducing one. In the first experiment it was demonstrated that perception of induced motion depends upon the duration of the interstimulus interval between the presentations of the inducing frame. In the second experiment it was shown that the perceived velocity of the induced movement can be different from that of the inducing one and depends on the duration of exposure of the induced object. In the third experiment a stimulus display was created in which the apparent displacement of an object and its induced motion are incongruous. The results are incompatible with subject-relative displacement as the sole determining factor of motion induction and they present some difficulties for the hypothesis that induced motion is the result of the apportionment of the objective displacement of the frame.
运动诱导的主体相关解释表明，诱导运动是主体视野中平面被错误感知移动的结果。该理论并不要求斑点和框架存在相对运动，在经典的斑点与框架条件下，仅需要不对称刺激。本文报告了三项关于频闪诱导运动的实验。实验设置较为特殊，诱导物体（斑点）仅在诱导物体（框架）曝光的刺激间隔期间呈现。这使得区分诱导运动的持续时间和诱导物体运动的持续时间成为可能。在第一个实验中，结果表明诱导运动的感知取决于诱导框架呈现之间的刺激间隔时间。在第二个实验中，结果显示诱导运动的感知速度可能与诱导物体的速度不同，且取决于诱导物体的曝光时间。在第三个实验中，创建了一个刺激显示，其中物体的明显位移与其诱导运动不一致。这些结果与主体相对位移作为运动诱导的唯一决定因素不相符，并且给诱导运动是框架客观位移分配结果的假设带来了一些困难。
