The marshmallow test, delayed gratification, and teaching kids to save

You've probably heard of the marshmallow test: sit a child in front of a marshmallow, promise them a second one if they can wait, and leave the room. The ones who hold out, the story goes, grow up to be more successful, better savers, more disciplined adults.

It's one of the most famous experiments in psychology — and one of the most misunderstood. The real findings, including a major 2018 replication, are far more useful for any parent trying to teach a child to save money. Let's separate the science from the myth.

What the marshmallow test actually found

The original studies were run at Stanford by psychologist Walter Mischel beginning in the late 1960s. Preschoolers were offered a small reward now (one marshmallow) or a larger reward later (two) if they could wait roughly 15 minutes alone with the temptation in front of them.

Years later, Mischel's team reported that children who had waited longer tended to have better outcomes as teenagers — higher test scores, better stress coping, stronger self-control. The conclusion that captured the public imagination: delayed gratification is a superpower, and you either have it or you don't.

That second half turned out to be wrong.

The 2018 replication changed the story

In 2018, researchers Tyler Watts, Greg Duncan, and Haonan Quan published a larger, more rigorous replication in Psychological Science. With a bigger and more diverse sample, the link between waiting and later success shrank to about half the original size — and most of what remained was explained by the child's family background and environment, not some innate willpower gene.

In other words: the ability to delay gratification isn't a fixed trait kids are born with. It's heavily shaped by circumstances — and that's good news, because circumstances are something parents can change.

Why trust matters more than willpower

There's an even more revealing piece of the puzzle. A 2013 University of Rochester study (Kidd, Palmeri, and Aslin) showed that children wait far longer when they've learned the environment is reliable — when a promise of "more later" has actually been kept before.

Children given an unreliable setup, where an earlier promise was broken, mostly grabbed the marshmallow immediately. And they were right to. Waiting only makes sense if "later" can be trusted to arrive.

This reframes saving entirely. A child who saves isn't displaying superior willpower — they're rationally betting that the future payoff is real. Your job as a parent isn't to drill self-control. It's to make "later" trustworthy and visible enough that waiting becomes the obvious choice.

How to build your child's saving muscle

If delayed gratification is teachable and trust is the lever, here's how to build it:

• Keep every promise about money. If savings is "for the bike," it has to actually become the bike. Each kept promise makes the next wait easier. Broken ones quietly teach kids to grab what's in front of them.
• Make the future visible. Abstract "later" is hard to wait for; a goal jar that fills toward a named target turns waiting into watchable progress. The child can see the second marshmallow coming.
• Shrink the wait to fit the age. A 6-year-old can wait three weeks; a teenager can wait three months. A goal that's too far away teaches giving up, not patience.
• Remove the decision. The marshmallow test puts willpower on trial every single moment. Real saving works better when the choice is made once, up front — split money 40% spend / 40% save / 20% give automatically, so there's no marshmallow sitting on the table to resist.

The real lesson for parents

The myth of the marshmallow test says some kids just have grit and some don't. The science says something far more hopeful: delayed gratification grows in the right environment — one where the future is reliable, visible, and worth waiting for.

You can't hand your child willpower. But you can build a system where saving is the rational, easy, rewarding choice. Do that consistently, and patience stops being a test they pass or fail and becomes simply how they handle money.

Chorey is designed to make "later" trustworthy: savings is locked toward a goal your child names, progress is always visible, and the 40/40/20 split removes the decision entirely. Join the waitlist to get in at launch.