Analysis of Student Errors in Algebra Material Using a Modern Diagnostic Approach

Titiani Reza Rahamdani; Elma Maula Safitri

doi:10.71094/logika.v1i2.222

Authors

Titiani Reza Rahamdani Pendidikan Matematika, Universitas Pendidikan Mandalika, Mataram, Indonesia Author
Elma Maula Safitri Pendidikan Matematika, Universitas Mataram, Mataram, Indonesia Author

DOI:

https://doi.org/10.71094/logika.v1i2.222

Keywords:

error analysis, algebra modern diagnostics, mathematics learning

Abstract

This study aims to analyze students' errors in solving algebra problems using a modern diagnostic approach based on error analysis. This approach allows for systematic identification of error patterns through classification into conceptual, procedural, and strategic aspects. The research method used was descriptive qualitative with 30 eighth-grade students in a public junior high school as subjects. Data were collected through diagnostic tests and task-based interviews. The results showed that conceptual errors were the most dominant type of error (45%), followed by procedural errors (35%), and strategic errors (20%). These findings revealed that most students did not understand the meaning of variables, the principles of algebraic operations, and the process of simplifying algebraic forms. This study recommends the development of visual reasoning-based instruction, scaffolding, and the use of digital diagnostic technology to improve students' understanding of algebra.

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