Erfan, M., Maulyda, M. A., Ermiana, I., Hidayati, V. R. and Widodo, A. (2020) “Validity and reliability of cognitive tests study and development of elementary curriculum using Rasch model”, Psychology, Evaluation, and Technology in Educational Research, 3(1), pp. 26–33. doi: 10.33292/petier.v3i1.51.