Verification of five‐factor models and reference scores for personality dysfunction and trait domains of the Personality Assessment Questionnaire for ICD‐11 (PAQ‐11), revised version

Abstract A brief self‐reported measure of the Personality Assessment Questionnaire for the 11th edition of the World Health Organization's International Classification of Disease (ICD‐11) (PAQ‐11) was developed to evaluate ICD‐11 personality traits. The aim of this study was to investigate the validity of the revised PAQ‐11 version (PAQ‐11R) with an additional item in the Dissociality domain and thresholds for the severity of personality dysfunction and domains. Study 1 examined the construct validity of the PAQ‐11R in 192 university students in Korea. Study 2 estimated tentative reference scores of personality dysfunction and domains of the PAQ‐11R in 91 patients in Korea. In study 1, the PAQ‐11R had a five‐factor structure and the revised Dissociality scale had better convergent and discriminant validities than the previous version. In study 2, the receiver operating characteristic (ROC) curve of the PAQ‐11R identified a threshold score of 35. Reference scores for domains were estimated as 15 for Negative Affectivity, 10 for Detachment, 8 for Anankastia, and 5 each for Disinhibition and Dissociality. These scores contribute to severity of personality disturbance but remain qualifiers only; they are not diagnostic. The results suggest that the PAQ‐11R is useful as a quick assessment tool for identifying the domains of personality dysfunction in clinical practice in harmony with the ICD‐11 guidelines.