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Does Serena Williams Have The Willpower To Ace The ‘Marshmallow Test’?

Enlarge this image German and Cameroonian kids were part of a recent experiment based on the classic “marshmallow test”: Put a single treat before a child but tell the child if he or she waits, say, 10 minutes, a second treat will be given. Nathalie Dieterle for NPR hide caption toggle caption Nathalie Dieterle for NPR Editor’s Note: This story was originally published in 2017 and has been updated. Tennis superstar Serena Williams clearly has conflicted feelings about marshmallows. In a just-published interview in Vogue magazine, she and her husband…

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