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Validation of self-report measures of narcissism against a diagnostic interview

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 again...

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Bibliographic Details
Published in:PloS one 2022-04, Vol.17 (4), p.e0266540-e0266540
Main Authors: Baggio, Stéphanie, Iglesias, Katia, Duarte, Miguel, Nicastro, Rosetta, Hasler, Roland, Euler, Sebastian, Debbané, Martin, Starcevic, Vladan, Perroud, Nader
Format: Article
Language:English
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Summary: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.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0266540