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Iperception. 2012;3(1):59-87. doi: 10.1068/i0430. Epub 2012 Jan 26.

Illusory object motion in the centre of a radial pattern: The Pursuit-Pursuing illusion.

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Faculty of Design, Kyushu University, 4-9-1, Shiobaru, Minami-ku, Fukuoka, 815-8540 Japan; e-mail: ;


A circular object placed in the centre of a radial pattern consisting of thin sectors was found to cause a robust motion illusion. During eye-movement pursuit of a moving target, the presently described stimulus produced illusory background-object motion in the same direction as that of the eye movement. In addition, the display induced illusory stationary perception of a moving object against the whole display motion. In seven experiments, the characteristics of the illusion were examined in terms of luminance relationships and figural characteristics of the radial pattern. Some potential explanations for these findings are discussed.


Visual illusion; equiluminance; illusory motion; motion perception; radial pattern; smooth pursuit

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