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Size constancy is an aspect of perceptual constancy in which an object will appear to be the same size to an observer despite of changes in light , rotation, distance, perspective etc. This skill is so important that is appears in an infant only a couple of weeks old.

Size constancy and perceptual developmentEdit

Size constancy in neurological disordersEdit

Size constancy and visual illusionsEdit

Size constancy in animalsEdit

See alsoEdit



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  • Wagner, M. (2006). The geometries of visual space. Mahwah, NJ: Lawrence Erlbaum Associates Publishers.


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