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Korean self-report version of the yale-brown obsessive-compulsive scale: factor structure, reliability, and validity
Soon-Ho Seol1, Jun Soo Kwon, Min-Sup Shin
1Department of Psychiatry & Behavioral Science, Seoul National University College of Medicine, Seoul, Republic of Korea.
Psychiatry Investigation
|March 14, 2013
Summary
The Korean self-report Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) demonstrates good validity for assessing obsessive-compulsive disorder (OCD) symptoms. This version accurately reflects the proposed obsessions and compulsions factors, supporting its clinical use.
Area of Science:
- Psychiatry and Clinical Psychology
- Psychometrics and Measurement
Background:
- Self-report versions of the Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) are widely used but lack extensive psychometric validation.
- Establishing construct validity is crucial for accurate assessment of obsessive-compulsive disorder (OCD) symptoms.
Purpose of the Study:
- To develop and evaluate the psychometric properties of a Korean self-report version of the Y-BOCS.
- To assess its factor structure, reliability, and validity in both clinical and non-clinical populations.
Main Methods:
- A Korean self-report Y-BOCS was administered to a non-clinical student sample (n=206) and a clinical OCD sample (n=199).
- Participants also completed measures of OCD, depression, and anxiety.
- Confirmatory factor analyses were used to evaluate the factor structure, reliability, and validity.
Main Results:
- Confirmatory factor analyses supported a two-factor structure (Obsessions and Compulsions) for the Korean self-report Y-BOCS.
- The scale demonstrated good internal consistency and convergent validity, though discriminant validity was weaker.
- A cutoff score of 16 achieved high correct classification rates for both OCD patients (84%) and non-clinical individuals (93%).
Conclusions:
- The Korean self-report Y-BOCS is a psychometrically sound and valid instrument for assessing OCD symptoms, comparable to the clinician-administered version.
- The proposed division into obsessions and compulsions factors is supported in the Korean version.
- Further research is recommended to refine the optimal cutoff score for this version.
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