Hypocrisy moderates self-interest bias in moral character judgments

Self-interest bias describes an observer's tendency to judge moral transgression leniently when they benefit from it. However, what factors moderate the self-interest bias is an open empirical question. Here, we investigated to what extent hypocrisy moderates the self-interest bias. Preregistered Study 1a (<i>N</i> = 194) and replication in Study 1b (<i>N</i> = 193) demonstrated that observers' interest impacts moral character judgments of hypocritical transgressors. This effect was explained by observers' goal attainment due to transgression (Study 2, <i>N</i> = 713) and agreement to aid observers' or ingroup interests (Study 3, <i>N</i> = 634). Importantly, transgressors' hypocrisy moderated the impact of observers' interests in moral character judgments (Studies 2 & 3). In summary, when judging hypocritical transgressors, peoples' moral character judgments tend to be biased by their or their group's interests. However, in comparison to non-hypocritical transgressors, this impact is less pronounced.