Slingshot Challenge and Star Mines: Two digital games as a prisoner's dilemma to assess cooperation in children.

The prisoner's dilemma (PD) has been widely adopted by researchers to investigate cooperation among adults and children. However, studies using the PD with children are not as extensive as experiments with adults. The main aim of this work was to introduce and show the feasibility and validity of two digital games with the structural features of a PD (Slingshot Challenge [SC] and Star Mines [SM]) to investigate children's cooperative behavior. In two experiments, 162 children aged 6 to 12 years played SC and SM in different conditions. It was observed that children understood the dynamics of a PD, and were highly motivated to play SC and SM. We found that participants were more cooperative playing SM than SC and cooperated conditionally as well. We also found that sex and first-trial cooperation were associated with higher levels of cooperation. The results support the utility of SC and SM as feasible, reliable, and valid instruments for assessing cooperative behavior in childhood.