Unclearly immoral: Low self-concept clarity increases moral disengagement.

This research examines the effect of self-concept clarity (i.e., having self-beliefs that are clearly and confidently defined, internally consistent, and stable) on moral behavior. Seven preregistered studies ( = 3,373) document that low (vs. high) self-concept clarity decreases moral behavior (e.g., donation, volunteering, tax compliance, honesty in an incentivized game). This effect occurs because low self-concept clarity increases moral disengagement, leading people to behave in morally questionable manners without damaging their self-concept. As evidence for this proposed underlying mechanism, we show that the effect of self-concept clarity on moral behavior is mediated by state moral disengagement and attenuates (a) among people with low trait moral disengagement, (b) among people with high trait moral identity internalization, and (c) in the presence of an honor pledge cueing moral engagement. We then show that the effect holds only when a prosocial act is congruent with personal values. Overall, these findings contribute to the literature on self-concept and moral self-regulation and have implications for how to promote morality and curb unethical behavior in society. (PsycInfo Database Record (c) 2024 APA, all rights reserved).