Misperceptions and Minipublics: Does Endorsement of Expert Information by a Minipublic Influence Misperceptions in the Wider Public?

Abstract

ABSTRACT As misperceptions undermine the factual basis for public debate, they pose a serious challenge to expert knowledge and the democratic legitimacy of public policy informed by expert evidence. In this paper, we theorize that in times of politicization and polarization of expertise, endorsement of expert information by a minipublic can serve to legitimize expert correction and render it more persuasive in the eyes of individuals. In developing our theoretical argument, we focus on the effect of a minipublic on individuals in the wider public – those who did not participate in such institutions. To test our theoretical predictions, we designed, pre-registered and fielded two experiments in the US (N = 2168) and one experiment in Ireland (N = 1125), during two different waves of COVID-19. The results show that minipublic endorsement significantly increases the uptake of expert information among (nonparticipating) citizens. Furthermore, when an expert correction explicitly asserts a scientific consensus, it is as effective as the minipublic endorsement. The findings have implications for the research on misperceptions, expertise and deliberative institutions.