Student’s Mental Model using Four-Tier Diagnostic Test on Acid Base
Abstract
The purpose of this study was to describe the mental model of students on acid-base material class XI phase F. The type of research used is descriptive research with a quantitative approach. The research population was students of class XI phase F, and the research sample taken was 31 students of XI F9 at SMAN 2 Payakumbuh with the sampling technique using purposive sampling technique. The data collection technique was carried out in two stages, namely the test stage and the interview stage. This test stage uses a four-tier diagnostic test instrument with the application of three levels of chemical representation. Then for the interview stage is carried out to obtain data and reconfirm the results of the diagnostic tests that have been carried out. The findings of this study detected that students have varied mental models. There are 41.1% have a mental model of synthesis-partial understanding B; 19.6% synthesis-partial understanding A; 15% initial model; 12.5% scientific model and 11.8% synthesis- misconception. This is supported by the persentation agreement of the interview result with the diagnostic test.
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