Abstract

This research aims to calculate the percentage of misconceptions and explain the misconception patterns that occur in students. The instrument used is a three-tier diagnostic test using the CRI confidence level method in the third tier. This type of research is descriptive research with a quantitative approach with a sample of class X students of SMAN 1 Gunungsari. The research data was processed based on the combination of student answers on the three-tier diagnostic test. The results showed the percentage of misconceptions amounting to 38.95% including misconceptions of 18.43%, positive misconceptions of 10.42% and negative misconceptions of 10.08%. Among the three concepts studied, the concept of molecules has the highest percentage of misconceptions with a percentage of 50.32%, the concept of atoms has a percentage of misconceptions of 45.21% and the concept of molecules has the lowest percentage of misconceptions with a percentage of 24.15%.

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