It’s worth noting that what the study specifically focuses on is not so much the prevalence of apocalyptic beliefs but their forms, in particular the way that each form affects how its adherents respond different kinds of risks. The hope of this people running this study was that it might be useful in helping policymakers communicate with people.

(At least, this is what I have gleamed from the abstract and from reading a couple of articles about it, which is the best that I can do given that I am not willing to pay for access to it.)