Identification of Students' Misconceptions on Vibration and Wave Material by Using the Certainty of Response Index (CRI)

Abstract

This study aims to determine the misconceptions that occur in junior high school students in the city of Medan in the science subject of vibration and waves. This research includes descriptive research. The research population is all junior high school students in Medan City. The schools that were sampled were selected using regional sampling techniques, namely the city center, mid-town, and suburbs. SMP Negeri 02 Medan was chosen for the downtown area, SMP Negeri 34 Medan was chosen for the mid-city area and SMP Negeri 29 Medan was selected for the suburbs. city. The sample group of respondents from each school was selected using a cluster random sampling technique with the details of SMP Negeri 02 Medan as many as 29 students, SMP Negeri 34 Medan as many as 27 students and SMP Negeri 29 Medan as many as 29 students. The instrument used in this study was a multiple choice test equipped with CRI. The test questions are given as many as 20 questions about vibrations and waves. Before the test questions are used, the instrument is validated and tested for reliability. After the tests were conducted on the three schools, the data obtained were analyzed using the CRI method. The data from the overall misconception research that occurred for the three schools studied were 23.1%, students who did not understand the concept of 63%, and students who knew the concept of 13.9%. Meanwhile, the highest misconception occurs in question number 7 by 43.5% and the lowest misconception in number 2 by 8.2%. So it can be concluded that the level of students' misconceptions about science (vibration and waves) in general in the city where the three samples studied are categorized as low.