IDENTIFYING DIFFERENTIAL ITEM FUNCTIONING OF TEACHERS’ JOB SATISFACTION SCALE WITH RESPECT TO LOCATION USING THE RASCH (IRT) MODEL

Abstract

It is important that a scale is fair to all respondents in a population. This is one of the essential factors to consider in selection and use of psychological test. Item Response Theory (IRT) standards show that a scale should be independent of the properties of the sample. Differential Item Functioning (DIF) means the difference between psychometric properties of an item between groups that have the same ability. Specifically, this research...