
In 2018, researchers at NYU and UC Irvine redid Walter Mischel’s famous “marshmallow test” with 918 four-and-a-half-year-olds — roughly ten times the size of the original — and found that a child’s ability to delay gratification only weakly predicted adolescent achievement, and even that small effect largely disappeared once family background and early cognitive ability were accounted for
You have probably heard the story: a four-year-old who can resist a marshmallow is quietly headed for a better life, and one who grabs it










