اعتباریابی و تحلیل عاملی نسخه فارسی پرسش‌نامه شخصیت خودشیفته درجمعیت غیربالینی

Background and purpose: The Narcissistic Personality Inventory-40 (NPI-40) is a self-report questionnaire for assessing narcissistic characteristics in non-clinical samples. The aim of this research was to assess the validity of the 40- items version of the Narcissistic Personality Inventory (NPI). Materials and methods: In a survey study, 500 people from Shahin Shahr, Isfahan, were randomly selected using stratified sampling. They were assessed by Narcissistic Personality Inventory-40 (NPI-40), NEO personality scale and Millon Clinical Multiaxial Inventory-II. Concurrent validity of the NPI was studied through correlational analysis with the Millon Clinical Multiaxial Inventory-II (MCMI-II). To study discriminate validity, the persons who obtained high low scores in NEO's extraversion and agreeableness factors were compared with their scores in narcissism scores. Results: In exploratory factor analysis (Promax rotation) three components were extracted including ................. .Significant correlation was found between the MCMI-II and NPI-40. Also, Test- Retest reliability coefficient and internal consistence of the scales were estimated to be 0.81 and 0.82, respectively. Conclusion: The results revealed that NPI-40, as a multidimensional scale has agreeable degree of reliability and Psychometric properties which could be considered as an appropriate instrument to screen narcissistic personality traits in non- clinical population.