For this study, the researchers recruited a sample of college men and women (N = 874) and examined the relationships among nonsuicidal self-injury (NSSI) in the past year, social self-efficacy, and two dimensions of interactional justice (IJ) from parents (specifically, interpersonal justice and informational justice). Results indicated that both dimensions of IJ were inversely associated with NSSI and, second, that social self-efficacy moderated both of these relationships. Clinical implications of these findings for family counselors are discussed. (Contains 2 figures.)