The Narcissistic Personality Inventory 8: Validation of a Brief Measure of Narcissistic Personality

Bjarne Schmalbach; Markus Zenger; Ana Nanette Tibubos; Ada Borkenhagen; Bernhard Strauss; Elmar Brähler

The Narcissistic Personality Inventory 8: Validation of a Brief Measure of Narcissistic Personality

Schmalbach, Bjarne ^[1] ; Zenger, Markus ^[3] ; Nanette Tibubos, Ana ^[1] ; Borkenhagen, Ada ^[4] ; Strauss, Bernhard ^[5] ; Brähler, Elmar ^[2]
1. [1] Johannes Gutenberg University of Mainz
  
  Johannes Gutenberg University of Mainz
  
  Kreisfreie Stadt Mainz, Alemania
2. [2] University of Leipzig
  
  University of Leipzig
  
  Kreisfreie Stadt Leipzig, Alemania
3. [3] Faculty of Applied Human Studies, University of Applied Sciences Magdeburg-Stendal 3. Integrated Research and Treatment Center AdiposityDiseases - Behavioral Medicine, Psychosomatic Medicine and Psychotherapy, University of Leipzig Medical Center, Leipzig, Germany
4. [4] University Hospital for Psychosomatic Medicine and Psychotherapy, University of Magdeburg
5. [5] University Hospital Jena, Institute of Psychosocial Medicine and Psychotherapy, University of Jena
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Localización: International Journal of Psychological Research, ISSN 2011-2084, ISSN-e 2011-2084, Vol. 13, Nº. 2, 2020 (Ejemplar dedicado a: Volume 13(2)), págs. 68-77
Idioma: inglés
DOI: 10.21500/20112084.4855
Títulos paralelos:
- El Inventario de Personalidad Narcisista 8: Validación de una breve medida de personalidad narcisista
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Resumen
- español
  El presente estudio se realizó con el objetivo de construir y validar una forma corta del Inventario de Personalidad Narcisista (NPI). El NPI es la medida más ampliamente aplicada para la evaluación de los rasgos narcisistas de la personalidad y, por lo tanto, es de gran relevancia para muchas preguntas de investigación en personalidad y psicología social. Para desarrollar la escala corta, primero encontramos la solución óptima de ocho ítems entre todas las combinaciones válidas de los ítems NPI-15 en una submuestra exploratoria (n = 1,165) de nuestra muestra representativa completa de la población general alemana. Luego validamos este modelo en una submuestra confirmatoria (n = 1,126). Además, examinamos su invariancia entre grupos de edad y sexo, así como su confiabilidad y validez constructiva y predictiva, comparándola con el NPI-15. Nuestros resultados indican que el NPI-8 es una medida válida y confiable de la personalidad narcisista con pérdidas mínimas en comparación con la versión de 15 ítems. Particularmente donde se desea brevedad y una evaluación económica, se debe considerar el NPI-8.
- English
  The present study was conducted with the aim of constructing and validating a short form of the Narcissistic Personality Inventory (NPI). The NPI is the most widely-applied measure for the assessment of narcissistic personality traits and, therefore, it is of great relevance for many research questions in personality and social psychology. To develop the short scale, we first found the optimal eight-item solution among all valid combinations of the NPI-15 items in an exploratory subsample (n = 1,165) of our complete representative sample of the German general population. We then validated this model in a confirmatory subsample (n = 1,126). Additionally, we examined its invariance across age groups and sex, as well as its reliability, as well as construct and predictive validity —comparing it to the NPI-15. Our results indicate that the NPI-8 is a valid and reliable measure of narcissistic personality with minimal losses compared to the 15-item version. Particularly where brevity and an economical assessment are desired, the NPI-8 should be considered.
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