ANALYSIS OF FINAL EXAMINATION PAPER OF CHEMISTRY 1 COURSE FOR POLYTECHNIC TVET FOUNDATION PROGRAM USING RASCH MEASUREMENT MODEL

Abstract

This study aims to analyze the final examination paper of  Chemistry 1 Course using Rasch Measurement Model. This course is a mandatory component for all students enrolled in the TVET Foundation program at the Polytechnic. For the purposes of this study, two polytechnics were randomly selected, resulting in a sample size of 175 students. The examination paper comprises five structured questions amounting to a total of 22 items. The study employed the Rasch model through Winsteps software to conduct a descriptive analysis, assessing the reliability of item constructs. This included calculating the reliability index to ensure measurement consistency, the separation index, item polarity, unidimensionality, item fit, and item difficulty level. The results indicated that the reliability index was 0.97, signifying a high level of reliability and consistency in the developed items. However, some items were identified as needing refinement, particularly those classified as moderate and difficult, which posed challenges for students' performance. The final analysis found out that the set of questions presented adhered the psychometric standards established by the Rasch model.