PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) TERHADAP KEMAMPUAN BERPIKIR KRITIS SISWA PADAMATERI MATRIKS KELAS XI SMA NEGERI 5 PEMATANGSIANTAR

Abstrak

Penelitian ini bertujuan mengetahui pengaruh model pembelajaran Problem Based Learning (PBL) terhadap kemampuan berpikir kritis siswa kelas XI SMA Negeri 5 Pematangsiantar Tahun Ajaran 2026/2027. Penelitian menggunakan pendekatan kuantitatif dengan desain Pre-Experimental One-Shot Case Study. Populasi penelitian berjumlah 346 siswa, dengan sampel 34 siswa kelas XI-2 yang dipilih melalui simple random sampling. Data dikumpulkan melalui tes kemampuan berpikir kritis dan angket persepsi siswa. Hasil uji prasyarat menunjukkan data berdistribusi normal dan memiliki hubungan linear. Analisis regresi linear sederhana menghasilkan persamaan Y = 16,348 + 1,006X, dengan t hitung 8,666 > t tabel 2,037, yang menunjukkan pengaruh positif dan signifikan. Nilai R Square sebesar 0,701 menunjukkan kontribusi PBL sebesar 70,1% terhadap kemampuan berpikir kritis siswa. Dengan demikian, model pembelajaran PBL berpengaruh positif dan signifikan terhadap kemampuan berpikir kritis siswa pada materi operasi matriks.

This study aims to determine the effect of the Problem-Based Learning (PBL) model on the critical thinking skills of Grade XI students at SMA Negeri 5 Pematangsiantar during the 2026/2027 academic year. The study employs a quantitative approach using a pre-experimental “one-shot case study” design. The research population consisted of 346 students, with a sample of 34 students from class XI-2 selected via simple random sampling. Data were collected through critical thinking skills tests and student perception questionnaires. Prerequisite test results indicated that the data were normally distributed and exhibited a linear relationship. Simple linear regression analysis yielded the equation Y = 16,348 + 1,006X, with a calculated t-value of 8,666 > t-table value of 2.037, demonstrating a positive and significant effect. An R-squared value of 0,701 indicates that PBL contributed 70,1% to the students’ critical thinking skills. Thus, the PBL model has a positive and significant effect on students’ critical thinking skills regarding the topic of matrix operations.