A door is a movable barrier that allows or blocks access to a space. It can be opened, closed, or partially open, but we still perceive it as the same shape.
Our ability to perceive objects as having consistent size, shape, color, and brightness even when they appear differently due to changes in viewing conditions.
Size Constancy: The tendency to perceive an object as maintaining its size despite changes in its retinal image caused by distance variations.
Shape Constancy: The tendency to perceive an object as maintaining its shape despite changes in its orientation or appearance from different viewpoints.