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Poprom S, Ketchatturat D. The Study of Validity Evidence on Cognitive Diagnostic Assessment on Addition and Subtraction of Fractions for Pratomsuksa 4 Students. GS KKU HS [internet]. 2024 Jun. 3 [cited 2026 Sep. 15];12(1):58-69. available from: https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/270241