Have you ever heard of the famous 1960’s experiment with children and marshmallows? Stanford researchers left 4-6 year old children alone in a room with a marshmallow, and told them they would get a second marshmallow after 15 minutes if they didn’t eat the first one. Some of the children ate the marshmallow right away, most tried to resist at least for a little while, and 1/3 of the children were able to wait long enough to get the second marshmallow.

The researchers then followed the children through adulthood and found that the ones who were able to delay gratification and wait for the second marshmallow had higher SAT scores (an average of 210 points) and were generally happier and more successful in life. 

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I’ve been reading a lot about how developing executive function in our children is crucial to their longterm success, and the ability to self-regulate behavior like in the marshmallow experiment is a central tenet to executive function. Executive function refers to the ability to self-regulate emotions, behavior, self-control, and discipline. These are skills that enable you to organize, plan, strategize, and execute.

Poor executive function is associated with high dropout rates, drug use and crime. In fact, good executive function is a better predictor of success in school than a child’s IQ. Children who are able to manage their feelings and pay attention are better able to learn. As executive function researcher Laura Berk explains, “Self-regulation predicts effective development in virtually every domain. (source)

Children develop executive function skills when they engage in true imaginative play, like playing cops and robbers. When children play make-believe, they make up stories, negotiate rules, and engage in conversations. This helps them develop cognitive and social skills. During imaginative play, children are truly regulating their own play, and their imagination is the only limit.

But in modern society, children increasingly play with toys with specific functions that limit their imagination. And they participate in sports and leagues with a defined set of rules. This type of structured play gives children less and less opportunities to regulate their behavior and speech. Add to that the increasing amounts of time children spend preparing for school testing at a young age, and there is even less time for imaginative play. Because of this, executive function has greatly decreased in the past century:

We know that children’s capacity for self-regulation has diminished. A recent study replicated a study of self-regulation first done in the late 1940s, in which psychological researchers asked kids ages 3, 5 and 7 to do a number of exercises. One of those exercises included standing perfectly still without moving. The 3-year-olds couldn’t stand still at all, the 5-year-olds could do it for about three minutes, and the 7-year-olds could stand pretty much as long as the researchers asked. In 2001, researchers repeated this experiment. But, psychologist Elena Bodrova at Mid-Continent Research for Education and Learning says, the results were very different.

“Today’s 5-year-olds were acting at the level of 3-year-olds 60 years ago, and today’s 7-year-olds were barely approaching the level of a 5-year-old 60 years ago,” Bodrova explains. “So the results were very sad.” (source)

Perhaps poor executive function development is why ADHD is now so overdiagnosed – children just don’t know how to self-regulate their behavior!

But all is not lost — we can help our children develop executive function skills by encouraging them to engage in make-believe, and by playing games that teach impulse control like Freeze and Simon Says.

Knowing the importance of executive function is going to fundamentally change how I play with Charlie and Olive now. When they want me to buy them the latest toy or video game, I hope that instead I’ll be able to encourage them play with their imaginations.

Do you think you’d pass the marshmallow test? Do you have good executive function skills?

For more reading:

Want to Give Your Kids an Advantage? Build Executive Functions
Old Fashioned Play Builds Serious Skills
Creative Play Makes for Kids in Control