The challenge
Look at the two squares marked A and B on the checkerboard. Which one is darker?
Objective
Demonstrate that the brain does not see the world as it is, but interprets it based on context.
Materials
Just your eyes and the image.
Description
This is one of the most famous optical illusions in perceptual psychology, created by MIT professor Edward Adelson in 1995. It shows that human vision is not a camera — it is an interpretive system that makes assumptions based on the surrounding environment. The same principle applies to how we perceive people and situations in daily life.
Source: https://en.wikipedia.org/wiki/Checker_shadow_illusion
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