Assessment of obsessive-compulsive disorder

Area of Science:

• Psychiatry
• Clinical Psychology
• Behavioral Therapy

Background:

• Self-report measures are crucial for assessing obsessive-compulsive symptoms (OCS) in behavioral therapy.
• The Maudsley Obsessional Compulsive Inventory (MOCI) is a widely used tool for OCS assessment.

Purpose of the Study:

• To evaluate the psychometric properties of the MOCI.
• To assess its concurrent, discriminant, and factorial validity in clinical populations.
• To determine its utility in treatment evaluation.

Main Methods:

• The study investigated the psychometric characteristics of the MOCI in clinical samples.
• Test-retest reliability, internal consistency, and validity were assessed.
• Discriminant validity was examined against normal controls and patients with anorexia nervosa, anxiety disorders, and depression.

Main Results:

• The MOCI demonstrated high test-retest reliability and high internal consistency for the total score.
• The 'checking' and 'cleaning' subscales showed moderate internal consistency; 'slowness' and 'doubting' were less useful.
• The MOCI effectively discriminated obsessional patients from normals, anorexia nervosa, and anxiety disorder patients, but not from depressive patients.
• Concurrent and factorial validity were satisfactory.
• The MOCI is less sensitive for evaluating treatment effects compared to target ratings.

Conclusions:

• The MOCI is a reliable and valid instrument for assessing obsessive-compulsive symptoms.
• Certain subscales may require revision or re-evaluation for clinical utility.
• While useful for treatment evaluation, its sensitivity may be limited compared to other methods.