August 11, 2025Chemistry in EducationOpen Access

Development of Two-Tier Multiple-Choice Diagnostic Test Instrument Based on Science Literacy on Chemical Equilibrium Material

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The developed instrument is valid and reliable, with an average expert validation score of 102 out of 128.
The reliability coefficient was 0.73 for the small-scale trial and 0.78 for the large-scale trial, indicating good consistency.
Students' science literacy was categorized as 'sufficient' with an average percentage of 46%, showing areas for improvement.
The instrument successfully categorized students into three ability groups, leveraging the Rasch model for analysis.

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Research develops a diagnostic test assessing science literacy on chemical equilibrium, indicating good reliability and validity.

Oktaviani et al. (2025) studied this question.

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