The Influence of Problem Based Learning Model on the Critical Thinking Elementary School

This study aims to determine the influence and effect’s magnitude of Problem Based Learning on the critical thinking skills of fifth grade students at Jeruk Purut II Elementary School. The research method used is quantitative research with the type of Pre-Experimental Design and One Group Pretest-Posttest Design. The data collection technique uses a critical thinking ability test sheet consisting of 12 questions. Data analysis technique using paired sample t-test and ETA squared t test. The results of the pretest and posttest hypothesis testing showed a sig. (2-tailed) 0.00 which is less than 0.05 so that there is a significant effect of the Problem Based Learning model on critical thinking skills. Then, the eta squared calculation shows a value of 0.88 which is belong to very large category. The conclusion from the research results is that the Problem Based Learning model influences the critical thinking skills of fifth grade elementary school students and with effect’s magnitude belong to very large category.Penelitian ini bertujuan untuk mengetahui pengaruh dan besarnya pengaruh Problem Based Learning terhadap keterampilan berpikir kritis siswa kelas V SDN Jeruk Purut II. Metode penelitian yang digunakan adalah penelitian kuantitatif dengan tipe Pre-Experimental Design dan One Group Pretest-Posttest Design. Teknik pengumpulan data menggunakan lembar tes kemampuan berpikir kritis yang terdiri dari 12 soal. Teknik analisis data menggunakan uji t sampel berpasangan dan uji t kuadrat ETA. Hasil pengujian hipotesis pretest dan posttest menunjukkan sig. (2-tailed) 0,00 yang lebih kecil dari 0,05 sehingga terdapat pengaruh yang signifikan model pembelajaran Problem Based Learning terhadap kemampuan berpikir kritis. Kemudian perhitungan eta kuadrat menunjukkan nilai 0,0880 yang termasuk kategori sangat besar. Kesimpulan dari hasil penelitian adalah model pembelajaran Problem Based Learning berpengaruh terhadap kemampuan berpikir kritis siswa kelas V SD dan besaran pengaruhnya termasuk dalam kategori sangat besar