For instance, both psychoanalytic theory and behavioral theory had held that the best way for a child to motivate himself to wait and get two marshmallows was for him to keep the reward at the center of his attention, to reinforce how delicious those two marshmallows would be when he finally got to eat them. But in fact, the opposite turned out to be true: when the marshmallows were hidden from view, children were able to delay much longer than when the marshmallows were right in front of them. The children who did best at the delay test created their own distractions. Some talked or sang to
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