Erfan M, Maulyda MA, Ermiana I, Hidayati VR, Widodo A. Validity and reliability of cognitive tests study and development of elementary curriculum using Rasch model. PETiER [Internet]. 2020 Sep. 25 [cited 2026 Apr. 17];3(1):26-33. Available from: https://petier.org/index.php/PETIER/article/view/51