Endang Susilaningsih, Nurkintan Aprilia, Feby Kristiansi
Misconceptions always occur in chemistry learning, especially in the reaction rate material, this is because the concept is abstract, so concept visualization is needed. This study aims to analyze the misconceptions of class XI students at the sub-microscopic level on the reaction rate material. This research method is descriptive quantitative, includes: (1) preparation of TTMCT items, (2) validation of items, (3) trials of items, (4) data analysis using Rasch model, (5) revision of items, (6) implementation, (7) implementation data analysis, (8) analysis of sub-microscopic level misconceptions. The subjects in this study were 38 students of class XI. The misconception analysis data was obtained from the results of students' answers to the TTMCT questions. The instrument used has been tested for validity and reliability. There are three reliability values obtained from the analysis of Rasch modeling, namely the reliability of person, item and Cronbach alpha. Person reliability values are 0.80 and 0.83, item reliability values are 0.90 and 0.91, and Cronbach's alpha value is 0.84. There are 18 valid items out of a total of 20 items. The results showed that the percentage of misconceptions at the sub-microscopic level was 29%, namely 11 out of 38 students experienced sub-microscopic misconceptions. © 2023 Author(s).
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang, Semarang, Indonesia
