Comparing two domain scoring methods for the Personality Inventory for DSM-5.

Area of Science:

• Psychological assessment
• Personality pathology
• Clinical psychology

Background:

• The Personality Inventory for DSM-5 (PID-5) is widely used for personality pathology assessment.
• Two scoring methods exist for its higher-order domain scales, differing in the number of lower-order facets used.

Purpose of the Study:

• To compare the results generated by two distinct scoring methods of the PID-5.
• To quantify the magnitude of differences between the scoring methods across various analytical approaches.

Main Methods:

• Compared two PID-5 domain scoring methods (25-facet vs. 15-facet) in clinical and undergraduate samples.
• Analyzed mean differences, convergent/discriminant validity correlations, and profile consistency (intraclass correlations).
• Examined case-level differences in individuals diagnosed with borderline personality disorder.

Main Results:

• Both scoring methods yielded largely similar results in terms of mean differences, correlations, and profile consistency across samples.
• Substantive differences were observed in 3 of 5 domain scales for individuals with borderline personality disorder.
• The 25-facet method (Krueger et al., 2012) and the 15-facet method (APA, 2013) showed high overall concordance.

Conclusions:

• The 15-facet scoring method is recommended for research due to its similarity to the 25-facet method.
• Further research is necessary to determine the optimal scoring method for clinical utility, especially for specific diagnoses.
• Clinical implications exist for personality disorder assessment, particularly for borderline personality disorder.