Analysis of Epistemological Obstacle on the Material of Two-Variable Linear Equation System Hendri Lutfiatul Hamam Nafis, Budi Usodo, Siswanto, Farida Nur Khasanah
Universitas Sebelas Maret
Abstract
This research aims to describe students^ epistemological obstacles in the matter of the two-variable linear equation system (SPLDV). The form of research used in this research is qualitative with a grounded theory method. This research involved 12 students from grade eight junior high school students in Indonesia. To collect the data test methods, observation, and interviews were used. The validity of the data is triangulation which requires the comparison of data with interviews. The technique of data analysis was in three stages, starting from data reduction, data presentation, and conclusion. The results obtained three types of epistemological obstacles, namely one-variable linear equations, algebraic operations, and mathematical models. The description of the obstacles is presented as follows: first for the linear equation obstacle one variable, students cannot understand the problems in the questions presented, second for the algebraic arithmetic operation obstacles, students cannot distinguish between variables and constants in the addition of one variable resulting in students not being able to add two variables, third for the mathematical model, that students cannot present word problems in the form of a mathematical model for one variable or even two variables. These obstacles resulted in students having difficulty understanding the material of the two-variable linear equation system (SPLDV).
Keywords: Epistemological Obstacles, Mathematic Education, Two-Variable Linear Equation System
