Chapter 1. Perceptual Illusions

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Scientific American: Psychology
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Perceptual Illusions

What we see, hear, taste, touch, smell, and feel may seem very real, but perceptions are not always accurate representations of reality. The brain's perceptual systems are prone to errors and distortions. Studying illusions, like those shown here, we can detect and better understand the brain's misinterpretations of visual input.

Four illusions show examples of moon illusion, Ponzo illusion, Ames room illusion, and the Shepard tables illusion. You can read full description from the link below

Perceptual IllusionsEnlarge figure Image description

Quiz

Quiz

Question 1.1

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Correct.
Incorrect.

Question 1.2

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Correct.
Incorrect.

Question 1.3

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Correct.
Incorrect.

Question 1.4

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Correct.
Incorrect.

Question 1.5

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Correct.
Incorrect.