Developmental psychology: Preschoolers sharing with others expect to get something back

In a series of experiments, Paulus, who is Professor of Developmental Psychology and the Psychology of Learning in Early Childhood at LMU, has looked at the question of whether 3- to 5-year-olds take a strategic approach when they ask one another for a favor. The results of his study have now been published in the journal Developmental Psychology, and the title of the paper, "It's Payback Time," answers the question in no uncertain terms.

One of the issues in child psychology that has received a lot of attention in recent years is the question of the motives that shape the social behavior of preschool children. The cognitive mechanisms that underlie social behavior in preschoolers, and the extent to which they employ strategic thinking in their interactions with each other are subject to intense debate.

Paulus shows in his latest study that 3- to 5-year-olds expect reciprocity from someone who has previously benefitted from an act of generosity of their own part. In the experimental set-up, the subject first allocated unequal shares of a resource to two recipients, and could subsequently ask either of the two for a share in the resources they controlled. In the latter situation, the subject always made the request to the recipient who had benefitted more from their previous generosity.

"So even preschoolers seem to be aware of the relative amounts of social capital they build up in their relations with other, and they make strategic use of this knowledge," Paulus says. "Reciprocity is a very important element of social life and is essential for the stability of a society. The study shows, for the first time, that young children already demonstrate the expectation that acts of generosity will be reciprocated by the recipient in their social behavior."