On Disease and Deontology: Multiple Tests of the Influence of Disease Threat on Moral Vigilance

Threat has been linked to certain facets of moral cognition, but the specific implications of disease threat for moral judgment remain poorly understood. Across three studies, we investigated the role of perceived disease threat in shaping moral judgment and hypothesized that perceived disease threat would cause people to be more sensitive to moral violations (or more “morally vigilant”). All three studies found a positive relationship between dispositional worry about disease transmission and moral vigilance. Additional analyses suggested that this worry was more strongly related to vigilance toward binding moral foundations. Study 3 demonstrated that moral vigilance was higher in individuals for whom the threat of disease was experimentally made salient, relative to individuals in both a neutral and a nondisease threat condition. Taken together, these results suggest that perceived disease threat may influence people’s moral vigilance across moral domains