RESUMEN
OBJECTIVE: Non-Suicidal Self-Injury (NSSI) scars are common in individuals with NSSI experiences. However, little is known about NSSI scars because related tools are limited. This study aimed to develop and validate the Korean version of the multidimensional Non-Suicidal Self-Injury Scar Scale (K-NSSI-ScarS), consisting of three components: NSSI scar measurement, NSSI scar cognition, and NSSI scar concealment. METHODS: A total of 333 Korean adults with at least one NSSI scar and history of NSSI within the last 5 years (age: 18 to 39 years) completed the online survey. We conducted exploratory (n=133) and confirmatory (n=200) factor analyses of NSSI scar cognition. To measure the internal consistency of each subfactor of the scar cognition and scar concealment components, we used Cronbach's α. Kappa and intraclass correlation coefficients were used to measure the test-retest reliability of the entire scale. We also assessed the convergent and construct validity of the K-NSSI-ScarS. RESULTS: Factor analyses showed a 5-factor structure consisting of 23 items. Internal consistencies and test-retest reliability were excellent. The moderate correlation between the five subfactors of NSSI scar cognition and related concepts (e.g., acquired capability of suicide) confirmed the convergent validity. Lastly, moderate correlations were found between NSSI scar concealment, self-concealment, NSSI scar measurement information, and the five subfactors of NSSI scar cognition. CONCLUSION: The results verify the psychometric properties and support the necessity of a multidimensional NSSI scar scale.
RESUMEN
Background: Numerous people in clinical settings who have experienced repeated self-injuries explain their non-suicidal self-injury (NSSI) as "habitual" or due to "difficulty avoiding impulses related to NSSI." Previous studies present retrospective reports, where they experience frequent self-injurious urges and try to resist but fail. However, no study has directly investigated repeated behavioral control problems of people who engage in chronic NSSI through behavioral measurements in an experimental setting. The current study sought to investigate whether people who repeatedly attempt NSSI demonstrate deficiency in task control ability called the object-interference (O-I effect). Methods: The current study performed object interference tasks on 90 participants, of which 45 were those who reported repeated NSSI while 45 comprised the control group. Results: We observed delayed reaction times for object stimulus compared to abstract stimulus in the NSSI group, indicative of the object interference effect. This reflects task control deficits and difficulties in NSSI related behavioral control in the repeated NSSI group. When NSSI tools were additionally presented as a target stimulus, longer reaction times and more errors were observed in the NSSI group compared to the control group. Discussion: The current study discusses the clinical implications of the results from diagnostic point of view and provides suggestions for future research for treatment and prevention.
RESUMEN
OBJECTIVE: There is currently no structured interview tool developed that comprehensively evaluates self-injurious thoughts and behaviors (SITB) in Korea. The Self-injurious Thoughts and Behaviors Interview (SITBI) collectively measures suicidal ideation, plans, gestures, attempts, and non-suicidal self-injuries (NSSI). The SITBI's reliability and validity have been established with it being widely used in English speaking countries. This study evaluated the psychometric validity of the Korean version of the SITBI (SITBI-K). METHODS: The SITBI's validity as a diagnostic assessment tool for NSSI and suicidal behavior disorder (SBD), as defined by the Diagnostic and Statistical Manual of Mental Disorders-5th edition, was examined. Analyses were performed on 108 university students reporting experiences of suicidal thoughts and behaviors (female 84.26%, mean age=22.10, ±SD 3.33). RESULTS: The SITBI-K displayed excellent interrater reliability, with a credible test-retest reliability at two months. Construct validity examined the correlation between the SITBI-K's modules and approved the self-report results. Appropriate convergent and discriminant validities were obtained for suicidal ideation, plans, gestures, attempts, and NSSI. CONCLUSION: The SITBI-K showed excellent psychometric validity at a level comparable to the original. Its clinical utility for both NSSI and SBD diagnoses was confirmed.
