Psychometric Properties of Brief Version of the Pathological Narcissism Inventory

Authors
Fatemeh Hassanzadeh
Afsaneh Akhani
AliAsghar Asgharnejad Farid
Department of Clinical Psychology, School of Behavioral Sciences and Mental Health (Tehran Institute of psychiatry), Iran University of Medical Science, Tehran, Iran
Abstract
Introduction

A narcissistic personality disorder is one of the disorders that has many different manifestations in clinical and research environments that make it difficult to diagnose and treat. This study aimed to evaluate the validity and reliability of the brief version of pathological narcissism (B-PNI) in Iranian society.

Materials and Methods

This was a cross-sectional study and the study sample was composed of 400 university students who were selected by available sampling. After getting the author’s agreement, the main version of Brief Pathological Narcissism Inventory was translated through a backward translation technique and the scale was used for pilot tests on 40 people. Convergent validity was calculated using the Narcissistic Personality Inventory (NPI-16).

Results

Confirmatory factor analysis on grandiose and vulnerable narcissism indicated the good validity of the inventory in these factors. Composite Reliability of the subscales ranged from 0.68 to 0.83. The Cronbach’s alpha coefficients obtained for this scale and its subscales from 0.63 to 0.83. This scale showed a good test-retest reliability in 15 days (r=0.984, p=0.001). Grandiose subscale just has shown the convergent validity with Narcissism personality Inventory (r=0.4, p=0.001) and there was not a meaningful correlation with Vulnerable narcissism (r=0.07, p= 0.6).

Conclusion

The Farsi version of the Brief Pathological Narcissism Inventory has a desirable validity and reliability and could be used in clinical activities and so in psychological researches in Iran.
Keywords
Pathological Narcissism Inventory
Grandiosity
Vulnerability
Validity
Reliability
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