PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) BERBASIS ETNOMATEMATIKA TERHADAP KEMAMPUAN PEMECAHAN MASALAH DAN SELF-EFFICACY MATEMATIS SISWA KELAS XI DI SMA NEGERI 5 PEMATANGSIANTAR

Abstrak

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran Problem Based Learning (PBL) berbasis etnomatematika terhadap kemampuan pemecahan masalah dan self-efficacy matematis siswa kelas XI SMA Negeri 5 Pematangsiantar Tahun Ajaran 2026/2027. Penelitian ini menggunakan pendekatan kuantitatif dengan desain Pre-Experimental One-Shot Case Study. Populasi penelitian adalah seluruh siswa kelas XI SMA Negeri 5 Pematangsiantar, dengan sampel sebanyak 34 siswa kelas XI-1 yang dipilih melalui teknik simple random sampling. Data dikumpulkan melalui tes kemampuan pemecahan masalah matematis dan angket self-efficacy matematis serta angket persepsi siswa terhadap pembelajaran PBL berbasis etnomatematika. Hasil uji prasyarat menunjukkan bahwa data berdistribusi normal dan memiliki hubungan yang linear. Analisis regresi linear sederhana pada kemampuan pemecahan masalah matematis menghasilkan persamaan (Y = 34,399 + 0,727X), dengan nilai t_hitung= 2,642 > t_tabel= 2,037) dan signifikansi 0,013. Nilai R Square sebesar 0,179 menunjukkan kontribusi sebesar 17,9%. Sementara itu, analisis regresi linear sederhana pada self-efficacy matematis menghasilkan persamaan (Y = 41,681 + 0,394X), dengan nilai t_hitung=  2,122 > t_tabel= 2,037) dan signifikansi 0,042. Nilai R Square sebesar 0,123 menunjukkan kontribusi sebesar 12,3%. Dengan demikian, skor persepsi siswa terhadap pembelajaran PBL berbasis etnomatematika menunjukkan hubungan positif dan signifikan secara statistik dengan kemampuan pemecahan masalah dan self-efficacy matematis siswa pada materi persamaan lingkaran.

This study aims to determine the effect of the ethnomathematics-based Problem Based Learning (PBL) model on students’ mathematical problem-solving ability and self-efficacy in Grade XI at SMA Negeri 5 Pematangsiantar in the 2026/2027 Academic Year. This study employed a quantitative approach with a Pre-Experimental One-Shot Case Study design. The population consisted of all Grade XI students at SMA Negeri 5 Pematangsiantar, with a sample of 34 students from Class XI-1 selected using simple random sampling. The data were collected through a mathematical problem-solving ability test, a self-efficacy questionnaire, and a student perception questionnaire regarding ethnomathematics-based PBL. The prerequisite test results indicated that the data were normally distributed and had a linear relationship. Simple linear regression analysis of students’ mathematical problem-solving ability produced the equation (Y = 34.399 + 0.727X), with a (t)-value of 2.642 greater than the critical (t)-value of 2.037 and a significance value of 0.013. The R Square value of 0.179 indicated a contribution of 17.9%. Meanwhile, simple linear regression analysis of students’ mathematical self-efficacy produced the equation (Y = 41.681 + 0.394X), with a (t)-value of 2.122 greater than the critical (t)-value of 2.037 and a significance value of 0.042. The R Square value of 0.123 indicated a contribution of 12.3%. Therefore, students’ perceptions of ethnomathematics-based PBL showed a positive and statistically significant relationship with students’ mathematical problem-solving ability and self-efficacy in the topic of circle equations.