Big Five Personality Traits of Adolescents aged 11–19 Years from the Czech and Slovak Republics: Age, Sex and Nationality Specifications

The article explores basic personality characteristics in accordance with the Big Five inventory; it concerns the age category of adolescence, i.e. the ages 11–19. Particular attention is paid to the variables of age, sex, and nationality as factors contributing to the establishment of these personality characteristics. The research involved 2,830 adolescents aged 11–19. The average age was 14.89 (SD = 2.23). Participants attended lower or higher secondary education (ISCED 2 and 3) in the Czech Republic or the Slovak Republic. The research employed the Big Five Inventory BFI-10. While investigating relations between individual variables, we used the method of linear regression and three models where age, sex, and nationality were used as predictors. Our results support the evidence that these are important predictors of basic personality characteristics in adolescence. Their predictive power is, however, not equal.