Search

Identification of students' misconceptions is crucial in Physics learning as an evaluation tool to address and reduce these misconceptions. This study aims to assess the quality of a four-tier diagnostic test using the CRI instrument, assisted by JotForm, and describe the profile of students' misconceptions related to momentum and impulse. The quality of the instrument is evaluated based with validity and reliability. The research follows the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) method. The instrument is developed during the analysis, design, and development stages. The implementation and evaluation stages involve capturing the profile and causes of students' misconceptions. The instrument's quality is assessed based on theoretical validity, which reached 89.29%. Empirical content validity haved percentages of false positives 6.93%and false negatives 6.53%. The empirical validity of the construct, with a significance level of 0.05, resulted in an rtableof 0.273. From the 15 questions tested, 12 questions were found to have empirical validity, and a reliability score of 0.475 was obtained. The study revealed that 3 students had low misconceptions, 14 students had medium misconceptions, and 6 students had high misconceptions. The causes of students' misconceptions were primarily false positives and humanistic thinking, accounting for 28.56%. In conclusion, the instrument developed in this study is valid and reliable, and it effectively identifies the profile and causes of students' misconceptions.

This study aims to determine the effect of applying the learning discussion model on students' critical thinking skills. This study uses a type of pre-experimental research with a research design, one group pretest-posttest design. The subjects of this research are students who program general physics courses from chemistry study program, biology study program, and mathematics study program. This research tested by giving pretest questions, treating discussion learning models, and posttest in general physics courses. The results of this study found that critical thinking skills students are the highest student (1) study program mathematics, (2) biology study program, and (3) chemistry study program. In addition, test results and learning each has a relationship with the other, proven by paired sample t-tests. That way, critical thinking skills are essential for students to master to compete in the era of technological development and the demands of the 21st century. Critical thinking skills are not seen from the department but from the ability of each individual in solving problems.