Kids who have trouble resisting temptation are more likely than patient preschoolers to grow into adults who lack self-control, a new study suggests.
Forty years ago, researchers put a group of four-year-olds through a classic test designed to measure self-control. The kids were left in a room with a cookie or a marshmallow treat (whichever they preferred). An adult told the children if they could wait for him to return, they could have two cookies or two treats instead of just one.
Kids and self-control