Measurement of Rubrical Essay-based Test Using Rasch Model

There are many educators use raw score as measurement for student's ability, but it never truly measures the right measurement. The raw score should be converted into a right linear metrics for ability measurement. This study is to implement rubrical analysis or assessment for essay-based test using Rasch Model (RM). It is to produce a reliable and accurate measurement procedure for student's performance in essay-based test. The initial study has identified the concept of RM to be applied in educational test or examination. The design and development stages has produced a comprehensive but simplified procedure template of scientific analysis within Bond&Bond Steps software. The proposed procedures contains of measuring score of accurate student's ability in LOGIT unit, providing of student's result profiling, and measuring reliability of the test set and the student's answers,. The procedure is designed for essay-based test which is more difficult to be analysed, compared to the multiple choice type. This procedure converts the student's answer into rubrical ratio-based scale to be most accurately measured and definitely better than the common practice of merely analysis on raw marks for each question. It will show true student's performance of cognitive performance (test) which represents the true student's ability, in order to accurately measure the right outcome. (C) 2016 Published by Future Academy www.FutureAcademy.org.uk