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What Little Babies See That You No Longer Can

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Before developing perceptual constancy, three- to four-month-old babies have a striking ability to see image differences that are invisible to adults. They lose this superior skill around the age of five months

Take a look at the red chips on the two Rubik cubes below. They are actually orange on the left and purple on the right, if you look at them in isolation. They only appear more or less equally red across the images because your brain is interpreting them as red chips lit by either yellow or blue light. This kind of misperception is an example of perceptual constancy, the mechanism that allows you to recognize an object as being the same in different environments, and under very diverse lighting conditions.

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