Today's kids may be able to delay gratification longer than those of the 1960's, some 50 years since the original “marshmallow test”, finds a new study. Researchers wonder if digital technology, preschool education, and parenting may enhance self-control.

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Today's kids may be able to delay gratification longer than those of the 1960's, some 50 years since the original “marshmallow test”, finds a new study. Researchers wonder if digital technology, preschool education, and parenting may enhance self-control.