2026-04-28T21:02:25Z https://jpp.fkip.unila.ac.id/index.php/jpp/oai

oai:ojs.jpp.fkip.unila.ac.id:article/349 2025-04-25T09:09:02Z jpp:ART driver

Assessing Pre-service Mathematics Education Teachers Deductive Reasoning via Proof Writing in Basic Geometry: The Power of SOLO Taxonomy Gagani, Ray Ferdinand Assessing Pre-service Mathematics Education Teachers Deductive Reasoning via Proof Writing in Basic Geometry: The Power of SOLO Taxonomy. Objectives: This study characterizes the developmental patterns of deductive reasoning via proof-writing of pre-service mathematics education teachers using the Structure of the Observed Learning Outcome (SOLO) taxonomy. Methods: One hundred three pre-service teachers were given twelve items involving basic concepts of plane geometry to assess. An in-depth analysis of their proof was done and they were grouped through a two-step clustering technique. Findings: Four compatible levels of developmental pattern to the SOLO level were detected. At level 0, students do not know how to establish proof. At level 1, students provided a single or few valid idea/s. Students demonstrating level 2 thinking provided many true ideas. However, the proofs are unclear and illogical. Level 3 students' proof is precisely logical. Conclusion: A trend of difficulty and success characterizes their deductive reasoning and indicates that those who were not successful in a task have superficial conceptual geometry knowledge. The research concluded that the SOLO taxonomy is a precise framework for conceptual knowledge assessment and that knowledge indeed has structure. The use of the SOLO taxonomy for assessment activity is recommended. Keywords: assessment, deductive reasoning, proof writing, solo taxonomy.DOI: http://dx.doi.org/10.23960/jpp.v13.i3.202307 FKIP Universitas Lampung 2025-04-25 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article application/pdf https://jpp.fkip.unila.ac.id/index.php/jpp/article/view/349 Jurnal Pendidikan Progresif; Vol 13, No 3 (2023): Jurnal Pendidikan Progresif; 979-996 2550-1313 2087-9849 eng https://jpp.fkip.unila.ac.id/index.php/jpp/article/view/349/213 Copyright (c) 2025 Ray Ferdinand Gagani https://creativecommons.org/licenses/by-sa/4.0