Perceptual Constancy- enables us to perceive an object as unchanging despite a changing stimulus
Size Constancy- the tendency to perceive an object as having a constant size even while our distance from the object varies
Even though the apple appears larger than the man's head in the picture, size constancy leads us to perceive that the apple is much smaller than the man's head.
Brightness Constancy- we perceive an object as having a constant lightness even while its illumination varies
The two smaller squares appear to have the same color even though the background color is different in each larger square.
Shape Constancy- we perceive the form of familiar objects as constant even while our retinal images of them change
Both shapes are orientated differently but we know that it is the same shape.
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