Confirmatory factor analysis of the Inventory of Statements About Self‐injury in a Spanish clinical sample

Abstract

Objectives The main aim of the present study was to confirm the two‐factor structure of the Inventory of Statements About Self‐injury‐ Part II (ISAS‐II), analyze its psychometric properties and test–retest reliability of Parts I and II of the ISAS. Method The sample was composed of 355 Spanish participants diagnosed with eating disorders or borderline personality disorder (mean age 27.89, standard deviation = 13.31; 315 women, 40 men). Two models proposed for the ISAS‐II were analyzed by means of confirmatory factorial analysis. Results A two‐factor model was confirmed, and a model with self‐care included in the intrapersonal factor was preferable. The ISAS‐II showed positive correlations with emotional dysregulation. Test–retest reliability showed statistically significant correlations at 7 months (n = 123). Conclusion The ISAS‐II is a valid instrument to assess nonsuicidal self‐injury in Spanish populations, making it possible to assess these behaviors, which require valid and reliable measures worldwide.

Intrapersonal and Interpersonal Functions as Pathways to Future Self-Harm Repetition and Suicide Attempts

“…For example, if intrapersonal functions maintain self-harm, then we'd simultaneously expect some degree of stability in functions over time. There is some albeit limited longitudinal work here, with studies of University students (Glenn and Klonsky, 2011b ) and clinical samples (Victor et al, 2016 ; Daukantaite et al, 2020 ; Pérez et al, 2020 ) finding moderate to large stability coefficients over short time periods (<12 months) when assessing functions via the Inventory of Statements about Self-Injury (ISAS; Klonsky and Glenn, 2009 ). Whilst the size of these coefficients varies across the studies, intrapersonal functions are typically more highly endorsed at multiple time points than interpersonal ones, and might therefore better reinforce self-harm over time.…”

“…Whilst the size of these coefficients varies across the studies, intrapersonal functions are typically more highly endorsed at multiple time points than interpersonal ones, and might therefore better reinforce self-harm over time. ISAS (Pérez et al, 2020 ). Taken together, the findings from these studies suggest some degree of stability but also change in both intrapersonal and interpersonal functions over relatively short time frames.…”

Gender Differences in the Psychometric Characteristics of the Inventory of Statements About Self-Injury in A Community Adolescent Sample

“…However, the correlation was particularly high between the implicit factors, suggesting the legitimacy of a general function factor with speci c self-harm motives. A recent CFA-analysis on a Spanish clinical sample could con rm the two-factor structure model, where self-care loaded into the intrapersonal factor (Pérez et al 2020). As a result of the relatively low subsample size of patients with borderline personality disorder, authors could not test invariance according to diagnosis (Pérez et al 2020).…”

“…A recent CFA-analysis on a Spanish clinical sample could con rm the two-factor structure model, where self-care loaded into the intrapersonal factor (Pérez et al 2020). As a result of the relatively low subsample size of patients with borderline personality disorder, authors could not test invariance according to diagnosis (Pérez et al 2020). It must be stressed that none of the above mentioned studies analyzed gender or age invariance in the factor structure of the ISAS Part II.…”

“…In the original version, each function is assessed by three items on a 3-point scale, ranging from 0 to 2 (0 = Not relevant, 1 = Somewhat relevant, 2 = Very relevant). Several studies divided these motives into intrapersonal and interperonal function categories (e.g., Klonsky & Glenn, 2011;Pérez et al 2020;Turner 2012). Intrapersonal functions summarize affect regulation, anti-dissociation, antisuicide, marking distress, and self-punishment.…”