Studying the Reliability, Validity and Factor Analysis of Student Engagement Scale (Case study: Students of Karaj City)

The purpose of the present study was to examine the factor structure, reliability and validity of students’ engagement scale. Participants were 450 junior (225 boys and 225 girls) high school students in Karaj, who were selected through random cluster sampling. The results of exploratory factor analysis and principal component analysis confirmed three factors (cognitive, emotional and behavioral engagement) in addition to the general factor of students’ engagement. Cronbach's alpha coefficients for its subscale ranged from 0.67 to 0.78. Moreover¡ the results of the confirmatory factor analysis revealed that the structure of the scale had an acceptable fit to the data and all the goodness-of-fit indices confirmed the model. The results of the factor analysis and the reliability and validity coefficients were almost similar to the previous researches conducted in the main culture. Considering its good psychometric properties¡ the scale is a useful tool for determining student's outcome expectancy.