Brief Symptom Inventory

Brief Symptom Inventory

The Brief Symptom Inventory (BSI) is a self-report questionnaire used to assess psychological distress and symptoms of mental disorders. The inventory is composed of 53 items that cover nine primary symptom dimensions, namely; Somatization, Obsessive-Compulsive, Interpersonal Sensitivity, Depression, Anxiety, Hostility, Phobic Anxiety, Paranoid Ideation, and Psychoticism. Additionally, the BSI has three general scales: Global Severity Index (GSI), representing the overall psychological distress; Positive Symptom Total (PST), representing the total number of symptoms reported by individuals; and Positive Symptom Distress Index (PSDI), representing the intensity of discomfort caused by the symptoms reported.

Brief Symptom Inventory
Brief Symptom Inventory

The BSI questionnaire has a high reliability level, with the coefficients of internal consistency ranging from 0.71 to 0.85 for different items. It has excellent test-retest reliability, indicating that the instrument’s results are consistent over time. Furthermore, the BSI has a good discriminant validity as it can differentiate between normative and clinical populations, and it has a strong convergent validity as demonstrated by high correlations with other relevant measures of anxiety and depression.

Various studies have evaluated the BSI’s reliability and validity, and the results suggest that the BSI is a reliable and valid instrument for measuring psychological distress and the symptoms of mental disorders. Therefore, the BSI questionnaire is considered a valuable and practical tool for assessing the psychological distress experienced by individuals and is widely used in clinical research and practice, including psychological evaluations and diagnostic assessments.

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