Martinetti R F
Percept Mot Skills. 1981 Jun;52(3):911-7. doi: 10.2466/pms.1981.52.3.911.
8 groups of subjects, 10 per group, had 10 trials for each of two perceptual tasks. Subjects in each group viewed a rotating trapezoid at a constant speed at equal-interval angles of tilt (0 degrees, 30 degrees, 60 degrees, 90 degrees) and two directions of stimulus tilt (toward observer and parallel to observer). It was predicted that most reports of oscillatory perception would occur for parallel tilt at 0 degree and 90 degree angles of orientation. In addition, there would be a hypothesized decrease in perceived oscillations from 0 degrees to 90 degrees when the stimulus was tilted toward the observer. Both direction of stimulus tilt and angle of orientation were significant. Post hoc comparisons yielded reliable differences from the parallel tilt and tilt toward the observer. The evidence supports the position that veridical information processing in the trapezoid oscillatory illusion is a joint function of signal-detection capability and availability of perceptual cues.
8组实验对象，每组10人，针对两项感知任务中的每一项都进行了10次试验。每组实验对象以等间隔倾斜角度（0度、30度、60度、90度）和两种刺激倾斜方向（朝向观察者和平行于观察者）观看匀速旋转的梯形。据预测，大多数关于振荡感知的报告将出现在0度和90度方向的平行倾斜情况下。此外，当刺激朝向观察者倾斜时，从0度到90度，感知到的振荡会有一个假设的减少。刺激倾斜方向和方向角度均具有显著性。事后比较得出与平行倾斜和朝向观察者倾斜的可靠差异。证据支持这样一种观点，即梯形振荡错觉中的真实信息处理是信号检测能力和感知线索可用性的联合作用。
