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

Question

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Size constancy is the perceptual ability to recognize that an object remains the same size even though the retinal image of the object changes as we move toward or away from it. In the case of the horse galloping toward us, its retinal image becomes larger, but we still perceive the horse as the same size due to size constancy. This illustrates the importance of this perceptual ability.

As the Retinal Image of a Horse Galloping Toward You