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Science 31 October 1975:
Vol. 190. no. 4213, pp. 479 - 480
DOI: 10.1126/science.1166319
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Articles

Science, Vol 190, Issue 4213, 479-480
Copyright © 1975 by American Association for the Advancement of Science

articles

The Muller-Lyer figure and the fly

G Geiger and T Poggio

In the Muller-Lyer illusion two horizontal line segments of equal length are perceived by humans as unequal. The gaze of a fly presented with Muller-Lyer figures corresponds to human eye movements and human (illusionary) evaluations of the segment lengths. It is suggested that a theory similar to the phenomenological theory which accounts for the fly's gaze may account for the human eye's movement during an observation of Muller-Lyer figures.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)