Methodological concerns in moral judgement research: Severity of harm shapes moral decisions created by Bastien Trémolière, Wim De Neys

Research on moral judgement traditionally deals with scenarios involving trade-offs between saving lives and causing harm or death. In the field of moral psychology and philosophy, these specific scenarios are regularly used jointly, regardless of the severity of harm. We predicted that the confounding between distinct phrasings involving different degrees of harm will have an impact on the frequency of utilitarian judgements regardless of the mere moral value of the action (as usually investigated in the moral judgement field). In line with this prediction, a first experiment showed that utilitarian responses were less frequent for conflicting moral scenarios that involved death, as compared to scenarios that involved non-lethal harm. A second experiment showed that participants' utilitarian responses decreased as the severity of harm increased. Experimental studies on moral reasoning should take greater care to avoid potential confounds associated with this content factor.