Zanker Johannes M, Walker Robin
Department of Psychology, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK.
Naturwissenschaften. 2004 Apr;91(4):149-56. doi: 10.1007/s00114-004-0511-2. Epub 2004 Mar 16.
Vivid motion illusions created by some Op art paintings are at the centre of a lively scientific debate about possible mechanisms that might underlie these phenomena. Here we review emerging evidence from a new approach that combines perceptual judgements of the illusion and observations of eye movements with simulations of the induced optic flow. This work suggests that the small involuntary saccades which participants make when viewing such Op art patterns would generate an incoherent distribution of motion signals that resemble the perceptual effects experienced by the observers. The combined experimental and computational evidence supports the view that the illusion is indeed caused by involuntary image displacements picked up by low-level motion detectors, and further suggests that coherent motion signals are crucial to perceive a stable world.
一些欧普艺术画作所创造的生动运动错觉，是一场关于这些现象潜在机制的激烈科学辩论的核心。在这里，我们回顾了一种新方法所产生的新证据，该方法将错觉的感知判断、眼动观察与诱导光流模拟相结合。这项研究表明，参与者在观看此类欧普艺术图案时进行的小幅度非自主扫视，会产生一种不连贯的运动信号分布，类似于观察者所体验到的感知效果。实验和计算证据相结合，支持了这样一种观点，即这种错觉确实是由低级运动探测器捕捉到的非自主图像位移引起的，并且进一步表明，连贯的运动信号对于感知一个稳定的世界至关重要。
