Developing Dispersion and Polarization Conceptual Inventory (DIPOLCI) to Identify Students^ Mental Models Fini Alfionita Umar, Achmad Samsudin, Taufik Ramlan Ramalis, Adam Hadiana Aminudin, Jajang Kunaedi, Shobrina Nurul Mufida, Itsna Rona Wahyu Astuti
Universitas Pendidikan Indonesia
Abstract
Identifying a student^s mental model is important for understanding scientific concepts. Dispersion and polarization are the sub concept of physics that studied in high school on light waves concept. This study aimed to develop dispersion and polarization conceptual inventory (DIPOLCI) to identify students^ model mental using Rasch analysis. The research method used analyzing, designing, developing, implementing and evaluating (ADDIE) method. The participants involved 60 students (38 female and 22 male) from senior high school in Patokbeusi, West Java, Indonesia and their average 17-18 ages old. DIPOLCI consists of 7 items in the form of one tier and then developed to be four tiers test. DIPOLCI examined through Rasch analysis based on fit statistics, Cronbach Alpha, item reliability and person reliability, and students^ mental model. The results show that DIPOLCI were valid and reliable to identify students^ mental model. Students^ mental model are mostly in the IN and SYN III were also analyzed in this research. It can be conclude the developed of DIPOLCI was able to analyze students^ mental model.
