Item Fit Investigation on Eco Critical Thinking Skills Instrument

Environmental problems and natural damage are significant problems in the 21st century learning. Critical thinking skills about environmental (Eco Critical thinking skills) are important for prospective teacher elementary school. Research to improve critical skills about the environment (eco critical thinking skills) in prospective teachers, requires a variety of instruments that are able to measure according to what will be measured. The purpose of the study was to examine the validity of the instrument by looking at the suitability of the questions (item fit) and student's ability on the politomical instrument of environmental education in prospective elementary school teachers. Instrument analysis used in the study using the Rasch model. The results showed Mean Square Outfit, Z-Standart Outfit and Outfit Point Measure Correlation from the item had the suitability of the problem to be able to measure according to the model being measured. This shows that the instrument is feasible to be used in the measurement.