Fraser’s Spiral

from “Visual Phenomena & Optical Illusions

Frazer Illusion

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

The picture on the left depicts “Fraser’s Spiral”. But if you place the mouse over it, it becomes obvious that there are no spirals…

Sources.

Fraser J (1908) A New Visual Illusion of Direction. Brit J Psych 2:307–320

Morgan MJ, Moulden B (1986) The Münsterberg figure and twisted cords. Vision Res 26:1793–1800

Popple AV, Sagi D (2000) A Fraser illusion without local cues? Vision Res 40:873–878

Parts of Fraser’s original paper have been made available by Hervé Varenneere.

 

Created: 2002-Aug-11


|  Impressum·Legal notice  | 
Last update 2013-10-04 by Michael Bach (G+)