Psychology / Unit 4 Psych 0461 short lesson, about 20 seconds
Perceptual Constancy
Captions available
The idea
Perceptual constancy is the perception of an object's size, shape, and brightness as stable despite changing sensory input.
In practice
A door swinging open projects a changing trapezoid on the retina and is seen throughout as a rectangle.
Where people slip
Constancy is an achievement, not a default. It requires cues that can be removed.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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