MISCONCEPTION ON 3-DIMENSIONAL FIGURE WITH FLAT SIDES BY USING CERTAINTY OF RESPONSE INDEX (CRI) METHOD

Abstract Misconception is a mismatch between a persons conception of facts, concepts, principles and rules, and procedures with the conception of the relevant science expert. Misconceptions can occur because of poor understanding on the material that has been taught. This may occur in any material, including 3-dimensional figure with flat side. One method to identify misconception is CRI by measuring confidence level in answering questions. The aim of this research is to find and describe students’ misconceptions on the 3-dimensional figure with flat side. This research was descriptive research with qualitative approach. Research data were obtained from 4 subjects who have most misconceptions and on different concepts. The subjects were taken from 9-grades who has studied 3-dimensional figure with flat side. The research was using written test with CRI scale and interview. The misconception that appears are on subject 1 misconceptions on 3 numbers consist of concept of cubes and cube’s nets, surface area of cube, and surface area of prism. Subject 2 misconceptions on 4 numbers about surface area of cuboid, definition of prism, volume of prism, and relationship of cubes and cuboids with prism (concept of prism). Subject 3 misconceptions on 4 numbers about cube’s nets, volume of prism, and on cube and cuboid relations with prisms (prism concepts). Subject 4 misconceptions on 5 numbers relating to concept of cuboids, surface area of cuboid, definition of prism, volume of prism, and relationship of cubes and cuboids with prisms (prism concepts). Keywords: misconception, 3-dimensional figure with flat side, Certainty of Response Index (CR