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Cognitive Diagnostic Assessment : Development and Aplication of a Three Tier Test Diagnostic Instrument to Assess Conceptual understanding a) Postgraduated of Science Education Program, Indonesia University Of Education, Jl. Dr. Setiabudhi No. 229, Bandung, Jawa Barat, Indonesia Abstract Cognitive diagnostic assessment (CDA) is an essential classroom assessment that could provide high-specific diagnostic information. To support teachers^ practical implementation of CDA in the science classrooms, this study aims to developed diagnostic instrument of the three tier test to analyze the level of understanding. The three-tier diagnostic test was developed using the theoretical framework by Treagust. The first tier assessed content knowledge- in the second tier, a reason is selected for the content answer- and the third tier allowed students to select how confident they were in their answers for the first two tiers. This reseach is development and research (R&D). The development has several stages like a) preliminary study, b) product draft design, c) product development. Product revisions are carried out at the product development stage. The final instrument consisted of 30 items. The three-tier test diagnostic instrument used in this study had been assessed in terms of being valid and reliable. The Sujek in this study was a class VII student at Junior High School in Bandung. The three tier diagnostic test on 127 students from two class showed that the category to understand the material of 25.4%- amounting to 43.3% misconceptions category and the category did not understand the material of 40.3%. Keywords: Cognitive diagnostic assessment, Three tier diagnostic test, misconception Topic: Mathematics and Science Education |
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