Motion Perception

Motion Perception is what enables us to perceive motion. The brain normally computes motion based on its assumption that shrinking objects are retreating and that enlarging objects are approaching. However there are exceptions, for example, large objects such as trains, appear to move more slowly than smaller objects, such as cars, moving at the same speed. Holiday lights create the allusion of movement using the phi phenomenon.When two adjacent stationary lights blink on and off in quick succession, the single light is perceived as moving back and forth between them. All in all, our brain constructs our perceptions.

Example.