Altruistic self-regulation in young children.

We investigated whether children would be willing to sustain delaying their own gratification in order to benefit someone else. We used a modified version of the classic "marshmallow task," in which children must sustain delaying gratification in the presence of the immediate reward for an unspecified amount of time in order to receive a larger reward later. Children were assigned to one of three conditions. In the Self condition, children were given a food item and were told that if they waited to eat it, they would receive a second food item. In the Prosocial condition, children also were given a food item but were told that if they waited to eat their food item, another child would get a food item. In the Nonsocial Control condition, children were given a food item but were told that waiting to eat it would not benefit anyone. We found that children waited significantly longer in both the Self and Prosocial conditions than in the Nonsocial Control condition, and children's wait durations in the Self and Prosocial conditions were not significantly different. Our results suggest that children are willing to engage in effortful self-regulation in order to benefit another child.