The Big Five Inventory (BFI) is one of the most widely used personality questionnaires, but very few studies have been conducted on its psychometric properties in Iranian population. This study was carried out with the aim of studying the psychometric properties of the BFI questionnaire. For this purpose, 390 university students in Tehran (210 girls and 180 boys) with an age range of 18 to 56 years (M = 27.52; SD = 8.79) were selected using the convenience sampling method and completed BFI and NEO-FFI questionnaires. Cronbach's alpha, multitrait-multimethod matrix, and confirmatory factor analysis were used to estimate the psychometric properties of the questionnaire. The result of the confirmatory factor analysis showed that 15 of the 44 items did not have a strong factor loading (higher than 0.40) on the corresponding factors and were therefore removed from the questionnaire. The fit indices showed that the Persian version of 29 questions (BFI-29) with 5 factors has a good fit with the data. The reliability analysis also showed that the range of Cronbach's alpha coefficients of the factors is from 0.70 to 0.79. The lowest Cronbach's alpha coefficient was related to agreeableness factor and the highest was related to conscientiousness. The findings from the multitrait-multimethod matrix showed that the BFI-29 questionnaire has good convergent and divergent validity with the NEO-FFI questionnaire. In general, based on the results of the present study, it can be said that the BFI-29 questionnaire has desirable psychometric properties and whenever a short tool for personality measurement is needed, this questionnaire can be used.

The purpose of this study was to investigate the relationship between the Big Five-Factor Model of Personality and dimensions of perfectionism from Frost et al point of view. In this study 191 (152 female and 39 male) undergraduate students ,selected by multistage random cluster sampling method were participated. The participants were from different departments of colleges of Human sciences of Shiraz University. The Big Five-Factor Model of Personality Questionnaire and Multidimensional Perfectionism Scale were used to measure personality traits and perfectionism. The results of multiple regression analysis indicated that concern over making mistakes and doubting about the quality of one’s actions dimensions were positively predicted by neuroticism. Perception of high parental criticism dimension was positively predicted by neuroticism and negatively by agreeableness. Setting high personal standards was also positively predicted by conscientiousness and openness to experience factors. In addition, Preference for order and organization were positively predicted by conscientiousness. In this study, implications and applications of the finding have been discussed.

Personality research has approached a salient consensus step due to widespread use of individual differences, converging on five big model factors with marketing concept. This paper clarifies a market mavenism psychology concept and relates market mavens with big five factor model. Market Mavens are consumer which have tendency to become especially involved in the marketplace. The purpose of this research is to contribute to identify prominent personality traits of market maven through big five model and attempts an indepth investigation to provide guidance for manager so that they can more effectively appeal to consumers who possess this tendency. 146 questionnaires were distributed and have analyzed. Multiple linear regression is used to analyze the effects of five big model traits on market mavens dependent variable. As a result, Extraversion and Openness and Conscientiousness are the three significant characteristic which highlights in their personality traits.Theoretically, these findings enrich the knowledge of the psychology of market mavens by suggesting important factors of their personality from big five perspective. Our finding provide the impetus for additional research aimed at further delineating the relationship shared between these two constructs (market mavenism and psychological traits).

The purpose of this research was to provide a model for auditors' social capital with emphasis on the five big personality factors. For this purpose, in 2023, using the snowball sampling approach, in-depth interviews were conducted with twelve expert faculty members and auditing institutions who were experts and experienced in the field of auditing. The research data was analyzed through the foundation data method, and the results of the coding showed that in the causal conditions, factors such as communication, individual development, organizational development, and intervening conditions include audit strategies, the structure of audit institutions, organizational culture; The ruling base includes the problems of auditors, the environment of auditing institutions, the social personality of auditors; Strategies are audit functions, behavioral functions, and at the end, the main result of this model was identified as individual positive consequences, positive consequences of the auditing organization. It means that auditors, as a social asset, consider themselves to be beneficial to society and the economy, preventing the wastage of resources and providing the interests of the general society as a duty, which has led to the positive consequences of individual auditors and institutions and increased the efficiency of auditors improving audit quality and advancing society's trust in auditors' reports.