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Objective: Non-Suicidal Self-Injury (NSSI) can have a major impact on the lives of individuals and those around them. The way in which a person feels about and perceives themselves (i.e. self-concept) appears central to understanding NSSI. The current study investigates three variables linked to self-concept: shame, social comparison, and self-concept integration. We examine how well these variables differentiate people who report past NSSI, people who report current NSSI, and people who have never engaged in NSSI., Design: Cross-sectional., Method: Individuals reporting NSSI in the past year (n = 51), individuals with a history of NSSI but none in the past year (n = 44), and individuals with no history of NSSI (n = 110) were compared on measures of shame, social comparison, and self-concept integration., Results: Shame was elevated in people with a history of NSSI but did not distinguish between past and current NSSI when other variables were controlled for. Self-concept integration was poorer in people reporting current NSSI than people reporting past NSSI, even when controlling for other variables., Conclusions: The results support the role of shame as a general marker for NSSI risk, but suggest self-concept integration may fluctuate more dynamically in relation to the recency of NSSI. The study is limited by a non-matched student control group., (Copyright © 2018 Elsevier B.V. All rights reserved.)

The goal of this study was to develop and validate a measure of self-rated positive and negative beliefs about one's non-suicidal self-injury (NSSI), the Experiences of Self-Injury Questionnaire (ESIQ). Psychometric properties and validation against NSSI severity and shame were tested in two U.S. and two U.K. samples of individuals who endorsed a history of NSSI. Exploratory and confirmatory factor analyses indicated five factors. Subscales were labeled Positive Beliefs, Personal Dislike, Interpersonal Concern, Emotional Suppression, and Emotional Expression. The Positive Beliefs Subscale covers beliefs that NSSI is valuable. Scores on this subscale were associated with endorsement of NSSI frequency, NSSI urges, and perceived likelihood of future NSSI. Other subscales showed validity in that they all showed unique effects on outcome indices of NSSI severity or shame. The ESIQ shows promise as a brief reliable measure of beliefs about and experiences of NSSI. [ABSTRACT FROM AUTHOR]