Pardede T, Santoso A, Diki D, Retnawati H, Rafi I, Apino E, et al. Gaining a deeper understanding of the meaning of the carelessness parameter in the 4PL IRT model and strategies for estimating it. REiD [Internet]. 2023 Jun. 30 [cited 2025 May 14];9(1):86-117. Available from: https://jurnal.uny.ac.id/index.php/reid/article/view/63230