Abstract

Despite the high prevalence and dangerous implications of nonsuicidal self-injury, researchers have seldom investigated how this may be influenced by interpersonal experiences, often focusing on intrapersonal factors. By examining the role of interpersonal experiences in influencing nonsuicidal self-injury and the psychological mechanisms underlying these relationships, we may achieve a more comprehensive understanding of the phenomenon. Across three studies (total valid N = 851), we tested whether ostracism, interpersonal maltreatment that could happen daily, promotes perceived objectification, thereby increasing nonsuicidal self-injury, using cross-sectional, and experimental designs. The results consistently showed that, compared with participants with neutral or nonsocial negative experiences, participants with ostracism experiences reported higher perceived objectification and were more likely to engage in nonsuicidal self-injurious behaviors. Moreover, perceived objectification mediated the effect of ostracism on nonsuicidal self-injury. We discuss our findings' significance for theoretical advancement and practical nonsuicidal self-injury prevention and intervention strategies, particularly those emphasizing belongingness and rehumanization.