Difficulty-Focused Contrastive Learning for Knowledge Tracing with a Large Language Model-Based Difficulty Prediction Unggi Lee author Sungjun Yoon author Joon Seo Yun author Kyoungsoo Park author YoungHoon Jung author Damji Stratton author Hyeoncheol Kim author 2024-05 text Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024) Nicoletta Calzolari editor Min-Yen Kan editor Veronique Hoste editor Alessandro Lenci editor Sakriani Sakti editor Nianwen Xue editor ELRA and ICCL Torino, Italia conference publication lee-etal-2024-difficulty https://aclanthology.org/2024.lrec-main.438/ 2024-05 4891 4900