Abstract

Students' critical thinking skills are still a problem that lecturers in Indonesia still need to overcome. One way to improve student's critical thinking skills is by giving action in class, namely the problem-based learning model. For this reason, this study aimed to determine the effect of problem-based learning models on students' critical thinking skills. This research method uses a quantitative approach. The research design uses quasi-experimental research using two classes as samples with different treatments. The instruments in this study used observation guidelines and tests in the form of descriptive questions to measure students' critical thinking skills. The data that has been obtained is in the form of data from pretest and posttest values. Data were analyzed using SPSS 16.0 to see the normality and homogeneity tests as a condition for conducting the t-test. The results obtained from the normality test with a sig level of 0.200> 0.05 mean that the data is normally distributed. Then a homogeneity test was carried out, and the results showed 0.365> 0.05, which indicated that the sample data was homogeneous or uniform. After the two test conditions are met, then the t-test is performed. The results of the t-test obtained sig. 0.00 <0.05 indicates an influence of the problem-based learning model on the critical thinking skills of students of the Indonesian Language and Literature Education Study Program, Universitas PGRI Yogyakarta.

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