Abstract Validity and Reliability of Student Engagement in School Scale

The aim of this study was to develop a student engagement scale in school)SES)Viga 2016 and determine its validity and reliability. This research was acorrelation type of factor analysis (exploratory factor analysis and confirmatory factor analysis). Factor analysis and reliability studies were conducted using data on 420(230 girls, 190 boys) tenth, eleventh, and twelfth graders of Semnan(academic year 2016- 2017) that were selected by Multistage Cluster Random Sampling and completed Students´ Engagement in School Scale(Viga, 2016) and Student engagement to school scale(Wang, Willett & Eccles, 2011 . Result of Confirmatory factor analysis through varimax rotation and Exploratory factor analysis, the axplored factors were behavioural, agency, self-regulation, affective and cognitive. The Cronbach's alpha were 0/78, 0/80, 0/67, 0/60, 0/42 for behavioural, agency, self-regulation, affective , cognitive and %78 for Student engagement in school. Also Confirmatory factor analysis confirmed these factors.To test the validity of instrument, Student engagement to school scale(Wang, Willett & Eccles, 2011) was used and correlation of 0/44 was concluded. The results permitted to find this scale presents psychometric qualities and can be used in research and psychoeducational practice, to assess the multidimensional students’ engagement in school. The future use of the SES is considered and proposed. This scale may be a useful opportunity for psychologists and teachers. and researcher can use to a valid instrument for Measuring engagement in school.