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Psychometric examination and normative data for the Narcissistic Personality Inventory 29 item version
Author(s) -
SVINDSETH MARIT F.,
SØREBØ ØYSTEIN,
NØTTESTAD JIM AAGE,
ROALDSET JOHN OLAV,
WALLIN JULISKA,
DAHL ALV A.
Publication year - 2009
Publication title -
scandinavian journal of psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.743
H-Index - 72
eISSN - 1467-9450
pISSN - 0036-5564
DOI - 10.1111/j.1467-9450.2008.00686.x
Subject(s) - psychology , narcissism , population , confirmatory factor analysis , norwegian , clinical psychology , normative , personality , psychometrics , grandiosity , social psychology , demography , structural equation modeling , statistics , linguistics , philosophy , mathematics , epistemology , sociology
The Narcissistic Personality Inventory (NPI) is commonly used in empirical studies of narcissism. Few population‐based studies have been published. Our aim was to do a confirmatory factor analysis (CFA) of the NPI 29 item version with a four‐factor structure, in two population‐based samples and in a patient sample, and present normative population‐based data. The NPI‐29 was filled in by 324 respondents from the Norwegian population, 231 from the Swedish population and 167 Norwegian psychiatric patients. The four‐factor structure of the NPI‐29 with Leadership/Power, Exhibitionism/Self‐admiration, Superiority/Arrogance and Uniqueness/Entitlement was reproduced in these samples. The CFA models showed good fit indices in all samples. Mean scores on the NPI‐29 and four subscales hardly differed between the samples. For the NPI‐29 total score and factors, few significant differences were observed. CFA of the samples supported the factor structure of the NPI‐29 formerly identified by principal component analysis of the Swedish population sample.