DEVELOPMENT OF THREE-TIER DIAGNOSTIC TEST ON CHEMICAL EQUILIBRIUM

Abstract

The objections of this study were 1) To observe the eleventh-grade students’ misconceptions of Chemical Equilibrium, 2) To create and verify the validity and reliability of a three-tier diagnostic test for Chemical Equilibrium misconceptions, and 3) To compare the consistency of diagnosis of the three-tier diagnostic test for Chemical Equilibrium misconceptions utilizing the test-retest method. The sample group included 60 eleventh-grade students. The research instrument was the three-tier diagnostic test for Chemical Equilibrium misconceptions. The analysis conducted: 1) the psychometric properties of the validity and reliability, and 2) the diagnostic quality as measured by the consistency of the diagnosis using the test-retest method. The research result found that 1) The diagnostic of misconceptions in Chemical Equilibrium indicates that there are three misconceptions, including 1) Equilibrium States 2) Equilibrium Constant, and 3) Factors that affect the Equilibrium. 2) The validity of the diagnostic test's development, IOC values ranged from 0.60 to 1.00. The internal reliability using Cronbach's alpha coefficient were .559 for the first test and .356 for the second. And the reliability of the test-retest method was to .997. 3) The test-retest diagnosis was compared using Cramer's V correlation coefficient, was 1.00. The first and second diagnoses results were in terms of statistical significance at level .05.