Martínez-Plumed, F. et al. 2022. When AI Difficulty Is Easy: The Explanatory Power of Predicting IRT Difficulty. Proceedings of the AAAI Conference on Artificial Intelligence. 36, 7 (Jun. 2022), 7719–7727. DOI:https://doi.org/10.1609/aaai.v36i7.20739.