High convergent validity among the five-factor model, PID-5-SF, and PiCD.

Area of Science:

• Psychology
• Psychiatry
• Personality Science

Background:

• The dimensional approach to personality disorders (PDs) is increasingly recognized.
• Two key instruments, the Personality Inventory for DSM-5 (PID-5) and Personality Inventory for ICD-11 (PiCD), measure these dimensions.
• The PiCD has received less empirical attention than the PID-5, particularly in relation to established personality models.

Purpose of the Study:

• To explore the convergent validity of the NEO Personality Inventory-Revised (NEO-PI-R), the PID-5 short form (PID-5-SF), and the PiCD.
• To compare the predictive ability of these dimensional measures for categorical PDs.
• To investigate the nature of the Psychoticism and Anankastia domains within these instruments.

Main Methods:

• A large sample (N=1,565) from the Spanish general population completed the NEO-PI-R, PID-5-SF, and PiCD.
• A subsample (N=758) also completed the International Personality Disorder Examination screening questionnaire.
• Statistical analyses were used to assess convergent validity and predictive accuracy.

Main Results:

• High convergent validity was found across the NEO-PI-R, PID-5-SF, and PiCD, supporting the five-factor model's structure.
• A significant convergence was observed between the two dimensional PD measures (PID-5-SF and PiCD), highlighting clinical relevance.
• The study supported Anankastia's placement as the opposite pole of Disinhibition, rather than a distinct domain.

Conclusions:

• The findings strongly support the convergent validity of dimensional personality disorder measures, including the PiCD.
• The high convergence between PID-5-SF and PiCD offers practical advantages for personality disorder assessment.
• Reconsideration of the personality correlates of Psychoticism and the dimensional structure of Anankastia is warranted.