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The Turkish Version of the Modified Agitation Severity Scale: Validity and Reliability Study
Fahriye Oflaz1, Pınar Çetinay Aydın2, Tuğba Şahin Tokatlıoğlu3
1School of Nursing, Koç University, Istanbul, Türkiye.
International Journal of Methods in Psychiatric Research
|July 22, 2026
Summary
The Turkish Modified Agitation Severity Scale (MASS) is a valid and reliable tool for assessing agitation in schizophrenia and bipolar disorder patients. This validated scale aids in early detection and intervention for improved patient safety.
Area of Science:
- Psychiatry
- Clinical Psychology
- Psychometric Evaluation
Background:
- Agitation is a common and challenging symptom in psychiatric disorders like schizophrenia and bipolar disorder.
- Objective and reliable assessment tools are crucial for effective management and patient safety.
Purpose of the Study:
- To evaluate the validity and reliability of the Turkish version of the Modified Agitation Severity Scale (MASS).
- To establish MASS as a practical instrument for assessing agitation in Turkish psychiatric patients.
Main Methods:
- The Turkish MASS was adapted and validated in 136 patients with schizophrenia and bipolar disorder.
- Reliability was assessed using KR-20 and Cronbach's alpha; validity was tested against the Overt Aggression Scale (OAS) and clinical intervention needs.
Main Results:
- The Turkish MASS showed strong internal consistency (KR-20=0.863, Cronbach's alpha=0.828).
- Significant correlations supported construct validity (MASS vs. OAS) and criterion validity (intervention vs. non-intervention groups).
Conclusions:
- The Turkish MASS is a valid, reliable, and practical tool for agitation assessment in psychiatric settings.
- It facilitates objective measurement, supporting timely interventions and enhancing patient safety.