摘要：The purpose of this study was to validate the online narcissism personality inventory (ONPI) in the Iranian sample. This research is an applied and methodologically was descriptive survey research. The statistical population included all individuals aged 18-50 years old active in cyberspace residing in Tehran. 400 individuals (200 females and 200 males) were selected using available sampling method. First, the online narcissism personality inventory (ONPI) was translated into Persian and its content validity was confirmed by psychology and counseling professors. After collecting the required samples, reliability of this tool was determined by SPSS-23 software using Cronbach's alpha for the components of Authority (α = 0.758), Self-Sufficiency (α = 0.767), Superiority (α = 0.712), Exhibitionism (α = 0.764), Exploitativeness (α = 0.754), Vanity (α = 0.705), Entitlement (α = 0.714) and for the whole inventory (α = 0.838). The construct validity of this tool using exploratory factor analysis also showed that the data obtained with the 7-factor model were goodness of fit. Then, the validity and reliability of the inventori's standard scores for each range of scores were assessed by Jmetrik-4.1.1 software. Behaviors that people display in the Cyberspaceare different from the real world, this tool can be used as a convenient tool for measuring narcissism.
