Indonesia Conference Directory

This research was conducted to validate and interpret 80-item tests of scientific argumentation skills. The tests tested covered some aspects of argumentation test based on Toulmin Argumentation Pattern (TAP). Fifty three students on their third semester in Biology Education Study Program in Central Java, Indonesia, have participated in this research. The Winsteps software program version 3.73 was used to conduct the Rasch analyses in this research. The results showed that (1) the majority of items displayed match the Rasch model, In the summary of the person response pattern, the infit value and mean square outfit are 1.0 or perfect, infit and z-std outfit are close to the ideal value of 0.0. Person reliability 0.73, means that the consistency of student responses is quite good and items reliability 0.83 means the quality of the items is good. Cronbach alpha value is 0.77, means that the interaction between person and item is good. It also showed the difficulty level of the items given: difficult, medium and easy. It can be said that the instrument can measure students argumentation abilities in every aspect.