Adaptation of the Narcissistic Personality Inventory among a Portuguese sample of incarcerated juvenile offenders. Issue 5 (27th May 2016)

• Record Type: Journal Article
• Authors: Pechorro, Pedro; Gentile, Brittany; Ray, James V.; Nunes, Cristina; Gonçalves, Rui Abrunhosa
• Is Part Of: Psychology, crime & law. Volume 22:Issue 5(2016)
• Page Start: 495
• Page End: 511
• Publication Date: 2016-05-27
• Subjects: Assessment -- Narcissistic Personality Inventory -- young offenders -- psychometric properties; Criminal psychology -- Periodicals; Law -- Psychological aspects -- Periodicals; 364.3
• DOI: 10.1080/1068316X.2016.1168421
• Languages: English
• ISSNs: 1068-316X

Abstract

ABSTRACT: The aim of the present study was to assess the psychometric properties of the Narcissistic Personality Inventory (NPI) and two of its short forms (NPI-16 and NPI-13) among a Portuguese sample of male incarcerated juvenile offenders ( N = 221). Of these, only the NPI-13 short version demonstrated a good fit in terms of its factor structure. The NPI-13 also showed promising psychometric properties in terms of its internal consistency, convergent validity, discriminant validity, and criterion-related validity. Statistically significant associations were found with age of crime onset, crime seriousness, conduct disorder symptoms, alcohol abuse, and cannabis use. These findings justify the use of the NPI-13, especially its Entitlement/Exploitativeness dimension, among incarcerated male youths.