An Application of the Rasch Model in Quality Testing of Polytomic Instruments

This study aims to apply the Rasch Model in testing the quality of the polytomy instrument. The source of the data is the responses of 288 students of SMPN 2 Prambanan they gave to the Student Perception Scale of School Climate. The Student's Perception of School Climate Scale consists of 20 items. The results of the analysis of the quality of polytomy instruments using the Rasch Mmode can produce more complete instrument characteristics consisting of reliability, dimensionality testing, item difficulty level, item suitability level, item functionality, and rating scale analysis.