Spat Vis. 2008;21(3-5):407-20.

Emmert's Law and the moon illusion.

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Department of Experimental Psychology, University of Bristol, Bristol BS8 1TN, UK. Richard.Gregory@bristol.ac.uk

Abstract

A cognitive account is offered of puzzling, though well known phenomena, including increased size of afterimages with greater distance (Emmert's Law) and increased size of the moon near the horizon (the Moon Illusion). Various classical distortion illusions are explained by Size Scaling when inappropriate to distance, 'flipping' depth ambiguity being used to separate botton-up and top-down visual scaling. Helmholtz's general Principle is discussed with simpler wording - that retinal images are attributed to objects - for object recognition and spatial vision.

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Emmert's Law and the moon illusion.

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Abstract

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