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.

As a matter of fact, nowadays Due to the increasing rate of competition between companies and organizations, high level of customer and consumers’ expectations, increased cost of advertising and investment, the concept of "Brand Personality and all impressive factors affecting that concept", have been considered noticeably. This paper is determined to consider "Human personality" as the most important factors affecting brand personality. Hence, this study has an applied aim and follows an experimental method and its purpose is to identify the relationship between “Brand personality” and “Customer personality”. This designed research model is based on a mixture of Aaker's brand personality (1997) and Ekelund’s customer personality (2008). Content validity and structure of research questionnaires. In order to analyze data derived from questionnaires, proportional to statistical needs Statistical Package for the Social Sciences software (Smart PLS) is used. The hypothesizes of this study is about the existence of any significant relationships between “Customer personality” and “Brand personality”. In regard to the result of all data analysis, all of the hypothesizes except one is approved the main idea of this study. It means the way that people perceived brands is mainly based on the type of their opinions, beliefs and personalities.

The present study was aimed to consider the relationship between type D personality and HEXACO personality dimensions. In a correlational study, 242 students from Islamic Azad University of Tabriz were selected through ratio cluster sampling as the statistical sample. Then the participants filled out HEXACO-Personality-Inventory and Type D Personality Scale. Data were analyzed by Pearson correlation coefficient and multiple regression. Findings showed that there was positive correlation between emotionality dimension with type D and negative affectivity, as well as there was negative correlation between Honesty-Humility, Agreeableness, Conscientiousness and Openness to experience with them. Extraversion had negative correlation with type D and its constituents (social inhibition and negative affectivity) too. Multiple regression analysis showed that HEXACO personality dimensions could predict 23.7% of variance of type D (R2=0.237). At all, it was concluded that there are correlations between type D and HEXACO personality dimensions; it seems that there are overlaps between them in respect of their nature.

Objectives Machiavellianism, Narcissism and Psychopathy are often referred to as the dark triad of personality. This study explored the relationships of those personalities with three factor personality models.MethodsThe current study was conducted in correlational descriptive research context. A group of 203 normal participants from Tabriz Payame noor university students answered to MACH-IV, MCMI-II and EPQ-R personality questionnaires. Data analyzed using the stepwise multivariate regression analysis method.ResultsAccording to three factors model of personality, Machiavellianism was correlated to neuroticism (r=0.46, P<0.01) and psychoticism (r=0.32, P<0.01), Narcissism was correlated to psychoticism (r=0.17, P<0.01) and extraversion (r=0.17, P<0.01), Psychopathy was correlated to psychoticism (r=0.43, P<0.01) and neuroticism (r=0.43, P<0.01).ConclusionThe dark dimension of personality can be described in terms of high psychoticism, according to three factor personality model.