Parks T E, Hui L M
Percept Psychophys. 1989 Nov;46(5):465-8. doi: 10.3758/bf03210861.
An informal demonstration is offered, which strongly supports previous contentions that, when the elements of a Poggendorff display appear to be arranged in pictorial space such that the two critical line segments are at different heights, an illusory impression of misalignment may occur. A second pair of demonstrations shows, however, that such a height difference is neither a necessary nor a sufficient cause of the illusion. In addition, the harmful effect of adding certain pictorial elements to the standard Poggendorff pattern requires a new understanding.
本文提供了一个非正式的演示，有力地支持了先前的论点，即当波根多夫展示中的元素在图像空间中排列，使得两条关键线段处于不同高度时，可能会出现错位的错觉印象。然而，第二组演示表明，这种高度差异既不是产生错觉的必要原因，也不是充分原因。此外，在标准波根多夫图案中添加某些图像元素的有害影响需要重新理解。
