Cowie R
Department of Psychology, Queen's University, Belfast, UK.
Perception. 1989;18(2):173-80. doi: 10.1068/p180173.
If a rotating trapezium is lit by a visible source at one side, it sometimes reflects light to the observer and sometimes appears dark. This provides information about its orientation which is relevant to the suppression of apparent reversals. Marked suppression does occur if the light is between the observer and the object, but in other cases novel phenomena arise. The onset of light may precipitate corrections, ie discontinuous shifts from an illusory percept to a veridical one. At certain stages the object may also appear to be transparent and luminous, particularly if a bar has been passed through it: the bar then appears to be visible through the object. The effects illustrate the limited use vision makes of seemingly excellent sources of information, but they also indicate that the problem may lie in misplaced sophistication rather than crudity.
如果一个旋转的梯形在一侧被可见光源照亮，它有时会将光反射给观察者，有时则显得黑暗。这提供了有关其方向的信息，这与抑制明显的反转有关。如果光源在观察者和物体之间，确实会出现明显的抑制，但在其他情况下会出现新的现象。光的开始可能会引发校正，即从不真实的感知到真实感知的不连续转变。在某些阶段，物体可能也会显得透明且发光，特别是如果有一根杆穿过它：此时杆似乎可以透过物体看到。这些效应说明了视觉对看似极好的信息源的利用有限，但它们也表明问题可能在于过于复杂而非粗糙。
