Development and Initial Validation of a Brief Symptom Measure.

Area of Science:

• Psychiatry
• Psychometrics
• Clinical Psychology

Background:

• Current self-report measures for psychiatric symptoms have limitations, including specificity and burden.
• A need exists for a brief, psychometrically sound measure of global symptomatology applicable across various settings and populations.

Purpose of the Study:

• To develop and validate the Brief Symptom Measure-25 (BSM-25).
• To assess the reliability, validity, sensitivity to change, and factor structure of the BSM-25.

Main Methods:

• Development and initial validation of the BSM-25.
• Examination of the scale's psychometric properties across multiple samples.
• Exploratory bifactor modeling to determine factor structure.

Main Results:

• The BSM-25 demonstrates good reliability and promising validity.
• The scale is suitable for multiple levels of care and sensitive to treatment-induced changes.
• Bifactor modeling indicated a strong general factor and two minor group factors.

Conclusions:

• The BSM-25 is a broadly applicable measure of symptom severity.
• It is easy to administer and score, suitable for diverse patient populations.
• The BSM-25 is appropriate for monitoring patient progress in routine clinical practice.