How many masks do you buy? A simple dilemma task to differentiate between individual and social rationality

Prior measures on rationality overlook the individual differences in the weight people place on social rationality versus individual rationality. The current research develops and validates an individual-collective dilemma task (ICDT) to distinguish different rationality types. It was translated from a reality that, at the beginning of the ongoing COVID-19 outbreak, a global shortage of face masks occurred because of the jumping demand for masks as a precautionary measure. The ICDT asked participants to decide how many masks to buy in front of a shortfall of masks, which facilitated coping with a hypothetical epidemic outbreak. Based on the number of masks they selected, three rationality groups emerged. Individual rationalists preferred self-interest goals to goals of social interests; social rationalists prioritized social-interest goals; balancers assigned equal weight to both goals. The ICDT showed sound test-retest reliability and criterion-related, discriminant, and convergent validity. The present research contributes to the literature on rationality assessment and offers policy-makers a valid and reliable tool to understand the distribution of rationalists among the public.

The online version contains supplementary material available at 10.1007/s12144-022-03338-x.