Pakarian Pooya, Yasamy Mohammad Taghi
School of Intelligent Systems, Institute for Studies in Theoretical Physics and Mathematics (IPM), Niavaran Square, Tajrish, Tehran, PO Box 19395-5746, Iran.
Perception. 2003;32(11):1307-10. doi: 10.1068/p5133.
Wheels turning in the movies sometimes appear to rotate backwards. This is called the wagon-wheel illusion (WWI). The mechanism of this illusion is based on the intermittent nature of light in films and other stroboscopic presentations, which renders them as a series of snapshots rather than a continuous visual data stream. However, there have been claims that this illusion is seen even in continuous light, which would suggest that the visual system itself may sample a continuous visual data stream. We examined the rate of this putative sampling and its variations across individuals while in different psychological states. We obtained two results: (i) WWI occurred in stroboscopic lights as expected, (ii) WWI was never reported by our subjects under continuous lights, such as sunlight and lamps with DC power source. Thus, WWI cannot be taken as evidence for discreteness of conscious visual perception.
电影中转动的车轮有时看起来会向后旋转。这被称为车轮错觉（WWI）。这种错觉的机制基于电影和其他频闪展示中光的间歇性，这使得它们呈现为一系列快照，而不是连续的视觉数据流。然而，有人声称即使在连续光下也能看到这种错觉，这表明视觉系统本身可能对连续的视觉数据流进行采样。我们研究了这种假定采样的速率及其在不同心理状态下个体间的变化。我们得到了两个结果：（i）如预期的那样，车轮错觉在频闪灯光下出现；（ii）在诸如阳光和直流电源灯等连续光下，我们的受试者从未报告过车轮错觉。因此，车轮错觉不能被视为有意识视觉感知离散性的证据。
