Electronic Theses and Dissertation

Rifa Putri Fajarna (2025) Pengaruh Model Pembelajaran Problem Based Learning Terhadap Kemampuan Berpikir Kritis Siswa SMA Pada Konsep Fisika. Skripsi. Fakultas Keguruan dan Ilmu Pendidikan. Universitas Syiah Kuala. Dibawah bimbingan Dra. Susanna, M. Pd., dan Drs. Abdul Hamid, M. Si.

Kemampuan berpikir kritis siswa SMA masih tergolong rendah karena minimnya latihan soal, metode pembelajaran yang kurang mendukung, dan terbatasnya media interaktif. Hal ini menyebabkan siswa mengalami kesulitan memahami, menganalisis, dan menjelaskan konsep fisika secara logis. Selain itu, kebiasaan menghafal materi dan rumus tanpa memahami konsep juga menyulitkan mereka dalam memecahkan masalah yang memerlukan analisis. Penelitian ini bertujuan untuk menganalisis pengaruh model pembelajaran Problem Based Learning (PBL) terhadap kemampuan berpikir kritis siswa kelas XI SMA Negeri 5 Banda Aceh pada materi Hukum Archimedes. Metode yang digunakan adalah Quasi Experimental Design dengan desain Pretest-Posttest Control Group, di mana kelompok eksperimen dan kontrol dipilih secara non-acak. Hasil penelitian menunjukkan bahwa rata-rata nilai tes akhir kelas eksperimen adalah 70,3 dengan simpangan baku 10,93, sedangkan kelas kontrol memperoleh rata-rata 63,5 dengan simpangan baku 12,78. Uji-t menunjukkan thitung > ttabel, yang berarti terdapat perbedaan signifikan antara kemampuan berpikir kritis siswa yang diajar menggunakan Problem Based Learning (PBL) dan Discovery Learning. Nilai N-gain kelas eksperimen sebesar 0,50 atau 50% (kategori cukup efektif), sedangkan kelas kontrol sebesar 0,40 atau 40% (kategori kurang efektif). Dengan demikian, dapat disimpulkan bahwa penerapan Problem Based Learning (PBL) lebih efektif dibandingkan Discovery Learning dalam meningkatkan kemampuan berpikir kritis siswa pada konsep fisika.

Kata Kunci: Problem Based Learning, Berpikir Kritis, Konsep Fisika.

Rifa Putri Fajarna (2025) The Effect of Problem Based Learning Model on Critical Thinking Skills of High School Students on Physics Concepts. Skripsi. Faculty of Teacher Training and Education. Syiah Kuala University. Under the guidance of Dra. Susanna, M. Pd., and Drs. Abdul Hamid, M. Si. The critical thinking skills of senior high school students are still relatively low due to the lack of practice exercises, learning methods that are less supportive, and limited interactive media. These conditions cause students to experience difficulties in understanding, analyzing, and explaining physics concepts logically. In addition, the habit of memorizing materials and formulas without understanding the underlying concepts also hinders them in solving problems that require analysis. This study aims to analyze the effect of the Problem Based Learning (PBL) model on the critical thinking skills of Grade XI students at SMA Negeri 5 Banda Aceh in the topic of Archimedes’ Principle. The research employed a Quasi-Experimental Design with a Pretest-Posttest Control Group design, where both the experimental and control groups were selected non-randomly. The results showed that the average post-test score of the experimental class was 70.3 with a standard deviation of 10.93, while the control class had an average score of 63.5 with a standard deviation of 12.78. The t-test results indicated that tcalculated > ttable, meaning there was a significant difference between the critical thinking skills of students taught using Problem Based Learning (PBL) and those taught using Discovery Learning. The N-gain score of the experimental class was 0.50 or 50% (moderately effective category), while the control class achieved 0.40 or 40% (less effective category). Therefore, it can be concluded that the implementation of Problem Based Learning (PBL) is more effective than Discovery Learning in improving students’ critical thinking skills in physics concepts. Keywords: Problem Based Learning, Critical Thinking, Physics Concepts.