Symptom checklist 90 revised (SCL-90 R)

The SCL-90 R (Derogatis, 1994; Italian version: Prunas et al., 2011) is a 90-item self-report questionnaire (rated on a 5-point Likert scale ranging from 0 ‘not at all’, to 4 ‘extremely’) that measures the perceived severity of psychopathological symptoms over the previous 7 days. SLC-90 R includes 9 subscales: Somatization (SOM), Obsessive–Compulsive (O-C), Interpersonal Sensitivity (I-S), Depression (DEP), Anxiety (ANX), Anger-Hostility (HOS), Phobic Anxiety (PHOB), Paranoid Ideation (PAR) and Psychoticism (PSY). The instrument also has three global indexes – Global Severity Index (GSI), Positive Symptoms Total (PST) and Positive Symptoms Distress Index (PSDI). In this study, the Global Severity Index has been used as a global index. The SCL-90 R subscales showed good reliability in this study (.75 < α < .90) and the global index scale showed high reliability in this study (α = .97).