Item Analysis of The Role of Teachers in Efforts to Prevent The Three Great Sins of Education with Rasch Modeling

Abstract

Teachers play an essential role in the educational process, not only as providers of academic knowledge but also as educators and guides responsible for nurturing students' character values. This study aims to test reliability and validity, namely finding statement items that can be measured precisely as well as finding statement items that can be submitted as material to measure the instrument of the teacher's role in cultivating student character values in efforts to prevent the three significant sins of education. The Three Great Sins of Education in this study have three indicators with the number of statements 15. Respondents in this study amounted to 197 teachers selected by probability sampling techniques. The results showed that the separation of 15.26 items could identify the respondents. The reliability value of the item is 0.83, which is categorized as good. Cronbach's alpha value is 0.80, indicating that the value is excellent and consistent. Instrument difficulty is classified as complicated, complex, medium, and accessible. The instrument of efforts to prevent three significant sins of education is declared reliable and valid with the criterion of "good", and 12 of the 15 points of the statement are said to be "valid", so to test the role of teachers in cultivating student character values can be measured using this instrument. The DIF results show that 3 question items are biased. So, it can be concluded that the instrument is qualified and can be used as material to measure the role of teachers in cultivating student character values in schools.