Psychometric Features of the Big-Five Personality Questionnaire for Children and Adolescence in Mashhad

Personality is a collection of traits that leads to individual differences in behavior as well as behavior stability and durability. This aim of the present investigation was to study psychometric features of the Big-Five personality trait’s questionnaire in children and adolescence in Mashhad. The sample included 450 students of Mashhad (253 females, 197 male) ranged between 8 and 18 years’ old that were selected from different Mashhad’s schools by multi-stage cluster method. Cronbach alpha test revealed 0.64 for extraversion, 0.73 for agreeableness, 0.70 for conscientiousness, 0.72 for neuroticism, 0.70 for openness, and 0.80 for total of the test. Moreover, test-retest correlation coefficient within a one-month interval range showed from 0.85 for openness to 0.92 for conscientiousness. The result of independent t-test showed that there are no significant differences between girls and boys personality factors. The results of factor analysis showed that special amount of factors is significant. Data from analysis after varimax rotation showed that the questionnaire was saturated with 5 factors that together explained 30.04% of the variance. The present data show that the Big-Five of personality trait’s questionnaire for children and adolescence has a high internal consistency, good validity, and reliability as well as a good fit factor analysis. In addition, there is no difference between female and male students in personality factors.