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Similarity is the tendency to perceive things that look similar to each other as being part of the same group. It has to do with perception. ! 0 5 years ago
Perceptual constancy is the tendency to perceive a familiar item as having a standard shape, size, and brightness no matter how the stimuli changes. Perceptual constancy assists us in identifying items under changing conditions. There are several perceptual constancies including, size, shape, and brightness.