Developing four-tier diagnostic test to measure students' misconceptions on simple harmonic motion material

Abstract

This research developed four-tier multiple choice test items to measure its validity, reliability, characteristics, and students' misconceptions on Simple Harmonic Motion material. This research was Research and Development (R & D) using 3D (Define, Design, and Develop) development model. The tenth graders of 1 Slawi Senior High School participated in tryout test and the eleventh graders of 1 Kramat Senior High School participated in the final field test. This research used documentation, interviews, questionnaires, and tests to collect the data. The developed test consisted of 30 four-level multiple choice items covering questions, the level of confidence in answering questions, reasons, and the level of confidence in giving reasons. This research yielded validity, reliability, discrimination power, difficulty level, and the percentage of misconceptions analyses. Validation results from 8 validators stated that the instrument was very feasible with the average percentage of 86.23%. The content validity result using Aiken coefficient got the average score of 0.80 with the valid category at the 0.05 significance level. The reliability of the developed test was 0.892. The difficulty level indicated 5 easy items, 22 medium questions, and 3 difficult questions. Students experienced misconceptions on Simple Harmonic Motion material of 58.63% in the medium category.