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Why can't you tickle yourself?

Live Science
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74% Informative

Neuroscientists say the brain already knows about and downplays the expected, predictable sensation of the self-tickle.

People consistently perceive the intensity of their own touch as weaker than that of an external touch.

People with schizophrenia struggle to recognize things they initiated from things they did not, which means they can not tickle themselves.

Roberta McLain is a science writer and science teacher based north of Boston , Massachusetts .

She is driven to make science understandable to people of all ages.

Her work has also appeared in publications such as Scientific American , The Science Writer , Science News Explores and The Pittsburgh Post Gazette .