Zunaira Fatima Syeda, Uzma Shahzadi and Ghazanfar Ali 2020. Rasch Calibration of Achievement Test: An Application of Item Response Theory. sjesr. 3, 2 (Jul. 2020), 426-432. DOI:https://doi.org/10.36902/sjesr-vol3-iss2-2020(426-432).