Contrasting two models of utilitarian reasoning

One influential framework for examining human moral cognition has been a dual process model, in which utilitarian judgment (e.g., infliction of harm for the greater good) is associated with cognitive control processes, while non-utilitarian judgment (e.g., avoiding such harms) is associated with emotional, automatic processes. Another framework of moral cognition, the two-dimensional model of utilitarian psychology, posits that utilitarian choices may reflect either instrumental harm, i.e., inflicting harm on an individual for the greater good; or impartial beneficence, i.e., impartially and altruistically acting for the benefit of the overall welfare. We evaluated preregistered hypotheses (https://osf.io/m425d) derived from these models of moral cognition in a sample of 275 neurologically healthy older adults. Our results suggest that both the dual process and two-dimensional models provided insights regarding utilitarian reasoning, including three cardinal domains of conflict between utilitarianism and common-sense morality: agent-centered permissions, special obligations, and personal rights. One prediction of the dual process-based model was supported by our findings, with higher emotionality associated with decreased endorsement of utilitarian judgments (b = - 0.12, p < .001). We also found partial support for the two-dimensional model, as utilitarian judgments about dilemmas involving agent-centered permissions and personal rights were dissociated; however, both sets of judgments were associated with utilitarian judgments involving special obligations (p < .001 and p = .008, respectively). We propose that our findings, with support for some elements of the dual process and two-dimensional models, can be integrated into a revised two-dimensional model of utilitarian judgment as including impartial beneficence and acceptance of attributable harms.