You stare at a downward-moving escalator for some time, then look at a black suitcase sitting stationary on the floor.Most likely, the suitcase will appear to be ______.
A)colored
B)moving upward
C)moving downward
D)wobbly

Question

Quizplus · Accepted Answer

This is due to the aftereffect of the visual stimuli of the downward-moving escalator, which causes the brain to perceive still objects as moving in the opposite direction.

You Stare at a Downward-Moving Escalator for Some Time, Then