Famous marshmallow test may not predict success

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If you’ve ever taken a psychology class, odds are you’ve seen video of kids agonizing over a marshmallow. The marshmallow test, where a kid is told they can have one treat now or two treats later, is one of the most famous tests in psychology.

It was developed by Walter Mischel in the late ’60s to study how kids delay gratification. Later, it was shown that kids who held out longer in the test scored higher on the SAT as teens, were healthier and even had changes in their brains as adults.