Earlier quoted context omitted.
Read your own damn references [1] before postulating how the poor are poor because they have no self-control and not the other way around: > A 2012 study at the University of Rochester (with a smaller N= 28) altered the experiment by dividing children into two groups: one group was given a broken promise before the marshmallow test was conducted (the unreliable tester group), and the second group had a fulfilled prom…
There are five follow-up studies in the Wikipedia section you cite [1]: A 1998 study "showed that 'preschool children who delayed gratification longer in the self-imposed delay paradigm, were described more than 10 years later by their parents as adolescents who were significantly more competent.'" A 1990 study "showed that the ability to delay gratification also correlated with higher SAT scores." A 2006 study used…
> Prior to the Marshmallow Studies at Stanford, Walter Mischel had shown that the child's belief that the promised delayed rewards would actually be delivered is an important determinant of the choice to delay, but his later experiments did not take this factor into account or control for individual variation in beliefs about reliability when reporting correlations with life successes.
So does poor impulse control cause poverty or does poverty cause poor impulse control?