Multiple-Choice With Reason (MCR) to measure the critical thinking skill on natural science : plant and animal movement system

The research conducted is to construct the students' critical thinking skills test instrument of VIII grade natural science subject matter of Plant and Animal Movement System. The developed test instrument is Multiple-Choice With Reason (MCR). Instrument development includes aspects of critical thinking theory adapted to the competencies of Curriculum 2013. Aiken-V is used to calculate the instrument feasibility index performed by expert based on construction, grammar, and content with score acquisition .88. The 20 items of Multiple-Choice With Reason (MCR) were tested in 256 VIII grade students at Public Junior School Kendal District. Instrument feasibility test based on empirical data was analyse with Confirmatory Factor Analysis (CFA). The results show that Chi-Square value = 225.40, df = 165, P-Value = .0012, RMSEA = .044 so that it can be concluded fit model with 13 items which is feasible to be used