As the retinal image of a horse galloping toward you becomes larger,it is unlikely that the horse will appear to grow larger. This best illustrates the importance of

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Size constancy is the perceptual phenomenon that allows us to perceive objects as maintaining their size and shape despite changes in the retinal image. As the horse gallops towards us and the retinal image becomes larger, size constancy allows us to perceive the horse as maintaining its size and not growing larger.

As the Retinal Image of a Horse Galloping Toward You