The mediator role of the psychological capital's effect on job performance of big five factor personality traits: A research on private sector employees

The main aim of this study is to examine the mediating role of the psychological capital in the influence of big five factors of personality traits on perceived job performance. In this context, firstly, the effect of big five factor personality traits on perceived job performance was investigated and then it was discussed whether this psychological capital could be mediated. The majority of the sample group consists of 325 people working in the private sector in Istanbul. A questionnaire including questions about demographic information, big five personality traits, psychological capital and job performance was applied to the employees. The research findings were analyzed with SPSS 24.0 statistical program. In the study, data were analyzed by using frequency analysis, descriptive statistics, reliability analysis, Kolmogorov-Smirnov test, Pearson correlation analysis, simple regression analysis, multiple regression analysis, independent samples t-test, one way Anova and Tukey HSD comparison tests. As a result of the study, it was found that there is a partial mediator role of psychological capital in the effect of big five factor personality on perceived job performance. The result is that the big five personality traits' conscientiousness and the psychological capital's optimism and resilience dimensions have an impact on job performance. The result is that the personality traits of employees differ according to position, age group and experience in current company. It has been reached that the psychological capital tendencies of employees differ according to the level of education, gender, position power, total experience and experience in current company. In addition, it has been found that the job performance becomes more significant than that of the job position.