Affluence vs Willpower: Why Rich Kids Are So Good at the Marshmallow Test

Why Rich Kids Are So Good at the Marshmallow Test

Affluence—not willpower—seems to be what’s behind some kids’ capacity to delay gratification.

Ultimately, the new study finds limited support for the idea that being able to delay gratification leads to better outcomes. Instead, it suggests that the capacity to hold out for a second marshmallow is shaped in large part by a child’s social and economic background—and, in turn, that that background, not the ability to delay gratification, is what’s behind kids’ long-term success.

The marshmallow test isn’t the only experimental study that has recently failed to hold up under closer scrutiny. Some scholars and journalists have gone so far to suggest that psychology is in the midst of a “replication crisis.” In the case of this new study, specifically, the failure to confirm old assumptions pointed to an important truth: that circumstances matter more in shaping children’s lives than Mischel and his colleagues seemed to appreciate.

This new paper found that among kids whose mothers had a college degree, those who waited for a second marshmallow did no better in the long run—in terms of standardized test scores and mothers’ reports of their children’s behavior—than those who dug right in. Similarly, among kids whose mothers did not have college degrees, those who waited did no better than those who gave in to temptation, once other factors like household income and the child’s home environment at age 3 (evaluated according to a standard research measure that notes, for instance, the number of books that researchers observed in the home and how responsive mothers were to their children in the researchers’ presence) were taken into account. For those kids, self-control alone couldn’t overcome economic and social disadvantages.