Our capacity for perceptual constancy even as illumination and retinal image change illustrates the importance of

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Perceptual constancy refers to the ability to perceive objects as unchanging in shape, size, color, and other properties, even though the sensory input we receive from them may vary. Top-down processing is the process by which we use our prior knowledge and expectations to interpret sensory information and create stable perceptions of the world around us. Thus, our capacity for perceptual constancy in the face of changing illumination and retinal image suggests that top-down processing plays a crucial role in perception.

Our Capacity for Perceptual Constancy Even as Illumination and Retinal