The challenge
Watch the animation and focus on the cross in the center. After a few seconds, what color is the dot that appears in place of the missing pink dot?
Objective
Observe the phi phenomenon and color aftereffects in motion perception.
Materials
Just your eyes and the animation.
Description
This animation combines two optical phenomena: the phi phenomenon (where a series of still images creates the perception of motion) and color aftereffects (where fatigued photoreceptors produce complementary color perception). Both demonstrate that visual experience is an active construction of the brain, not a passive recording of reality.
Source: https://en.wikipedia.org/wiki/Motion_aftereffect
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