The process dissociation procedure (PDP) for moral cognition was created to separately measure two dispositions of moral judgment based on the dual-process theory of moral reasoning: deontological and utilitarian inclinations. In this paper we raise some concerns from a psychometrics perspective regarding the structure, reliability, and validity of the moral PDP as a measure of individual differences. Using two simulation studies as well as a real sample ofN= 1,010, we investigate the psychometric properties of the moral PDP. We present novel (...) evidence showing that (1) some correlations between PDP parameters are mathematical artifacts, and as such cannot be taken as evidence in support of a theory, (2) there are severe response inconsistencies within dilemma batteries, and (3) reliability estimates for these scores seem to be far below the accepted standards. We discuss some potential theoretical and content-related reasons for these statistical issues and their implications. We conclude that in their current form, PDP measures of utilitarian and deontological tendencies are sub-optimal for assessing individual differences. (shrink)

Previous studies showed that when reading a scenario depicting a harmless moral violation in the domain of purity, people nevertheless implicitly infer that harm was involved. In this study, we assessed whether this “implicit completion” process found in the perception of immoral actions is also present in people with autism spectrum disorder. In two experiments, we found an implicit activation of harm representations in response to all kinds of moral violations in neurotypical adults as well as in adults with autism. (...) These results suggested that the perception of moral violations is relatively preserved in people with autism. (shrink)