Solikhin F, Wiyarsi A, Muhson A, Retnawati H. Psychometric Evaluation and Item Response Theory Validation of a Higher-Order Thinking Skills Test on Buffer Solution Concepts in Chemistry. MJLI [Internet]. 2026 Jul. 31 [cited 2026 Nov. 6];23(2):142-65. Available from: https://e-journal.uum.edu.my/index.php/mjli/article/view/26424