Just because some children were more effective than others at distracting themselves from [the marshmallow in the famous Marshmallow Test] doesn't mean this capacity was for the impressive results found ten years later. Instead, both of these things may have been due to something about their home environment. If that's true, there's no reason to believe that enhancing children's ability to defer gratification would be beneficial: It was just a marker, not a cause. By way of analogy, teenagers who visit ski resorts over winter break probably have a superior record of being admitted to the Ivy League. Should we therefore hire consultants to teach low-income children how to ski in order to improve the odds that colleges will accept them?