Thou Shalt Not Kill, Unless It Is Not a Human: Target Dehumanization May Influence Decision Difficulty and Response Patterns for Moral Dilemmas

Past research on moral dilemmas has thoroughly investigated the roles of personality and situational variables, but the role of targets in moral dilemmas has been relatively neglected. This paper presents findings from four experiments that manipulate the perceived dehumanization of targets in moral dilemmas. Studies 1, 2 and 4 suggest that dehumanized targets may render the decision easier, and with less emotion. Findings from Studies 1 and 3, though not Studies 2 and 4, show that dehumanization of targets in dilemmas may lead participants to make less deontological judgments. Study 3, but not Study 4, suggests that it is potentially because dehumanization has an effect on reducing deontological, but not utilitarian judgments. Though the patterns are somewhat inconsistent across studies, overall, results suggest that targets’ dehumanization can play a role in how people make their decisions in moral dilemmas.