Revisiting the marshmallow test: A conceptual replication investigating links between early delay of gratification and later outcomes
Watts, Duncan and Quan, Psychological Science, 2018. Conceptual replication focused on children whose mothers had not completed college. An extra minute waited at age 4 went with a small gain in achievement at age 15, about half the size of the original associations and reduced by two thirds with controls for family background, early cognitive ability and the home environment. Most variation came from waiting at least 20 seconds. Links to behavioural outcomes at 15 were much smaller and rarely statistically significant.
Watts, Duncan and Quan, Psychological Science, 2018. Conceptual replication focused on children whose mothers had not completed college. An extra minute waited at age 4 went with a small gain in achievement at age 15, about half the size of the original associations and reduced by two thirds with controls for family background, early cognitive ability and the home environment. Most variation came from waiting at least 20 seconds. Links to behavioural outcomes at 15 were much smaller and rarely statistically significant.
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Psychological Science. doi:10.1177/0956797618761661 https://doi.org/10.1177/0956797618761661