Development and Examination of the Five-Factor Obsessive-Compulsive Inventory-Short Form

Area of Science:

• Psychological assessment
• Personality psychology
• Clinical psychology

Background:

• The Five-Factor Obsessive-Compulsive Inventory (FFOCI) assesses obsessive-compulsive personality disorder (OCPD) traits within the five-factor model (FFM) framework.
• The original FFOCI, comprising 120 items across 12 subscales, demonstrates robust correlations with existing OCPD measures.
• The lengthy nature of the FFOCI may impede its practical application in clinical settings.

Purpose of the Study:

• To develop a concise, clinically useful short form of the FFOCI.
• To maintain the psychometric integrity and nomological network of the original FFOCI.
• To enhance the discriminant validity of the OCPD assessment measure.

Main Methods:

• Item response theory (IRT) methods were employed to derive a shorter scale from the original FFOCI.
• The study focused on item selection to create a 48-item FFOCI-Short Form (FFOCI-SF).
• Psychometric properties, including nomological network replication and discriminant validity, were evaluated.

Main Results:

• A 48-item FFOCI-Short Form (FFOCI-SF) was successfully developed.
• The FFOCI-SF demonstrated the ability to recreate the nomological network of the original 120-item FFOCI.
• The FFOCI-SF exhibited improved discriminant validity compared to the longer FFOCI measure.

Conclusions:

• The FFOCI-SF serves as a brief and effective measure for assessing lower-order traits associated with OCPD.
• The development of the FFOCI-SF enhances the clinical utility of OCPD assessment.
• The study validates the use of IRT methods in creating efficient personality assessments.