Open AccessValidation of self-report measures of narcissism against a diagnostic interview
Author(s) -
Stéphanie Baggio,
Katia Iglesias,
Miguel Duarte,
Rosetta Nicastro,
Roland Hasler,
Sebastian Euler,
Martin Debbané,
Vladan Starčević,
Nader Perroud
Publication year - 2022
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0266540
Subject(s) - narcissism , narcissistic personality disorder , pathological , personality assessment inventory , clinical psychology , personality , convergent validity , personality disorders , psychology , population , psychometrics , personality pathology , medicine , social psychology , environmental health , internal consistency
The Pathological Narcissism Inventory (PNI) and the Narcissistic Personality Inventory (NPI) are often used to screen for pathological narcissism but have rarely been validated against a clinician-administered diagnostic interview. Our study evaluated the convergent validity of the PNI and NPI against a diagnostic interview for narcissistic personality disorder (NPD) in a clinical population. We used data from a psychiatric outpatient center located in Switzerland (n = 123). Correlations between PNI/NPI and NPD ranged between .299 and .498 (common variance 9.0–24.8%). The PNI and NPI should be used carefully to screen for NPD. We highlight a need to increase the compatibility between the conceptual underpinnings of the PNI, NPI and NPD.