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All Journal STEM Education International
Rima Nuraini
Universitas Negeri Malang
Education Environmental Science Mathematics

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Development of Four-Tier Diagnostic Instruments to Identify Students’ Understanding of Electrolyte and Non-Electrolyte Solutions Septiana Ayuningrum Nofinadya; Rima Nuraini; Isnanik Juni Fitriyah
STEM Education International Vol. 1 No. 2 (2025): STEM Education International
Publisher : PT Ahan Group Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71289/18tnsy31

Abstract

This paper outlines the level of validity and reliability of a four-tier diagnostic instrument to identify the level of understanding of students on electrolyte and non-electrolyte solutions. The instrument development follows the stages proposed by Habiddin & Page (2019), namely mapping concepts, testing and interviewing, defining students' unscientific ideas, developing a four-tier prototype, validating the four-tier prototype, and refining the final four-tier instrument. The product eligibility percentage is 89.08%, which falls within the very feasible category. 
A Four-Tier Diagnostic Instrument in Acid-Base Properties of Salt Solution: Development Procedure Rima Nuraini
STEM Education International Vol. 1 No. 2 (2025): STEM Education International
Publisher : PT Ahan Group Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71289/xsj76636

Abstract

This study aims to determine the feasibility of a four-tier diagnostic instrument on salt hydrolysis. The development uses a four-tier diagnostic instrument development procedure by Habiddin & Page (2019) with 6 stages: concept identification, initial test and interview, identification of unscientific student concepts, development of a four-tier diagnostic instrument prototype, prototype validation, and final prototype improvement. The four-tier diagnostic instrument was developed from a multiple-choice instrument open to reasons for capturing student concepts. At last, the finding from this research and development obtained the final product in the form of a four-tier diagnostic instrument with 27 questions that have four levels (tier), the first tier is in the form of questions and answers, second tier is in the level of confidence in the answer chosen, third tier is in the form of selecting the first tier, and the fourth tier is the level of confidence in the reasons chosen. The level of confidence is measured on a scale of 1-5. The instrument developed has an average content validity of 89.45%, with a very decent category and very high reliability (0.858). This shows that the developed four-tier diagnostic instrument is highly feasible for identifying students' misconceptions about salt hydrolysis material.
Co-Authors Isnanik Juni Fitriyah Septiana Ayuningrum Nofinadya