Cohn T E, Lasley D J, 1990, "Wallpaper illusion: cause of disorientation and falls on escalators" Perception 19(5) 573 – 580
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Wallpaper illusion: cause of disorientation and falls on escalators
Theodore E Cohn, David J Lasley
Received 29 March 1988, in revised form 3 April 1990
Abstract. The wallpaper illusion, first described over a century ago, can occur when a person with normal binocular vision views a pattern that is periodic in the horizontal meridian of the visual field. Escalator treads present such a pattern. Evidence is presented favoring the view that disorientation experienced by escalator riders is caused by this illusion. Possibly some of the estimated 60000 escalator falls occurring in the United States each year are linked to it.
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