Iwintolu, Rukayat Oyebola, Oluwaseyi Aina Gbolade Opesemowo, and Phebean Oluwaseyi Adetutu. 2024. “Effect of 2-PL and 3-PL Models on the Ability Estimate in Mathematics Binary Items”. Journal on Efficiency and Responsibility in Education and Science 17 (3):257–272. https://doi.org/10.7160/eriesj.2024.170308.