The Development of Mathematics Final Assessment Instrument Test Second Semester in Grade VIII of Junior High School

Abstract

This study aims to produce a final assessment test instrument second semester of Mathematics in grade VIII of Junior High School that is valid and reliable, as well as to know the validity, reliability, level of difficulty, discriminatory power, and distractor efficiency as the results of the development of Mathematics Second Semester final assessment instrument test in grade VIII of Junior High School. This research method is research and development (R&D) by adapting the seven development steps of Djemari Mardapi. The subjects in this study are two expert validators selected through the purposive sampling technique, and 182 students in grade VIII of UPT SPF SMP Negeri 26 Makassar were chosen through a random technique by agreement. The objects in this study are content validity, construct validity, reliability, difficulty level, discriminatory power, and distractor efficiency. The study result discovered that (1) the instrument test consists of 30 multiple choice items that meet the content validity aspect with the sum of an internal consistency coefficient is 1; (2) from the construct validity aspect, 24 items formed a factor, and all valid items are found in the 12 indicators that developed; (3) in terms of reliability aspect, the semester final assessment instrument test is reliable with the sum of the reliability coefficient is 0,74; (4) in terms of the level of difficulty, there are two items with difficult category, 18 items with medium category, and four items with the easy category; (5) in terms of discriminatory power, there are 19 items fill the excellent and medium category, so there is no need to be revised, two items with criteria needed to be revised, and three items with inadequate criteria; (6) in terms of distractor efficiency, there are 21 items have distractors that functioned well, and three items have distractors that functioned poorly. Thus, the semester final assessment instrument test developed in this study is feasible to measure students' Mathematics learning outcomes.