PENERAPAN MODEL PROBLEM BASED LEARNING BERBANTUAN MEDIA AUGMENTED REALITY UNTUK MENINGKATKAN PEMAHAMAN KONSEP SISWA PADA MATERI GELOMBANG CAHAYA KELAS XI SMAN 5 TUALANG

Abstract

This study aims to determine the differences in students' conceptual understanding through the implementation of the Problem-Based Learning (PBL) model assisted by Augmented Reality (AR) regarding the topic of light waves. A quasi-experimental method with a posttest-only control group design was employed. The sample consisted of 86 Grade XI Science students from SMAN 5 Tualang, divided into an experimental class and a control class, with 43 students in each. The experimental class received AR-assisted PBL instruction, while the control class received conventional instruction. The research instrument was a conceptual understanding test comprising 17 multiple-choice questions based on seven indicators of conceptual understanding. Data were analyzed using both descriptive and inferential statistics, including tests for normality, homogeneity, and the Independent Sample T-Test. The results showed that the experimental class achieved an average posttest score of 75.09 (categorized as "good"), whereas the control class scored 67.16 (categorized as "fairly good"). The experimental class outperformed the control class on six of the seven indicators of conceptual understanding. The Independent Sample T-Test results yielded a t-value of 3.155 (df = 84) and a Sig. (2-tailed) value of 0.002 (< 0.05), indicating a significant difference in conceptual understanding between the two classes. Thus, the implementation of AR-assisted PBL serves as a viable instructional alternative to support students' conceptual understanding of light waves by combining problem-solving activities with interactive conceptual visualization.