Spivey-Knowlton M J, Bridgeman B
Center for Visual Science, University of Rochester, NY 14627.
Percept Psychophys. 1993 May;53(5):467-74. doi: 10.3758/bf03205194.
The Poggendorff illusion has often been explained as purely an interaction between the parallels and the transversals. The present study demonstrates that additional spatial context exerts an influence on this illusion. In Experiment 1, we examined the effects of a surrounding tilted frame (complete and degraded versions) on collinearity adjustments in the upright and rotated Poggendorff figures. The frame's orientation was always oblique. Relative to the no-frame condition, frames decreased error in collinearity adjustments in the upright Poggendorff figure, and increased error in the rotated Poggendorff figure. In Experiment 2, a circumscribing circle did not cause an orientation-inhibition effect (Ebenholtz & Utrie, 1982, 1983), suggesting that the effect of the frame on the Poggendorff illusion may not be closely related to the rod-and-frame effect. In Experiment 3, orientation of a central texture modulated the magnitude of the illusion. The results do not serve to explain the mechanisms behind the Poggendorff illusion, but they do demonstrate the importance of visual reference frames in understanding perceived misalignment.
波根多夫错觉常常被解释为纯粹是平行线与横线之间的一种相互作用。本研究表明，额外的空间背景会对这种错觉产生影响。在实验1中，我们研究了一个周围倾斜框架（完整和简化版本）对直立和旋转的波根多夫图形共线性调整的影响。框架的方向总是倾斜的。相对于无框架条件，框架减少了直立波根多夫图形共线性调整中的误差，而增加了旋转波根多夫图形中的误差。在实验2中，一个外接圆并未产生方向抑制效应（埃本霍尔茨和乌特里，1982年，1983年），这表明框架对波根多夫错觉的影响可能与棒框效应并无密切关系。在实验3中，中央纹理的方向调节了错觉的程度。这些结果虽无助于解释波根多夫错觉背后的机制，但它们确实证明了视觉参照框架在理解感知到的错位方面的重要性。
