Pardede, Timbul, Agus Santoso, Diki Diki, Heri Retnawati, Ibnu Rafi, Ezi Apino, and Munaya Nikma Rosyada. “Gaining a Deeper Understanding of the Meaning of the Carelessness Parameter in the 4PL IRT Model and Strategies for Estimating It”. REID (Research and Evaluation in Education) 9, no. 1 (June 30, 2023): 86–117. Accessed May 10, 2025. https://journal.uny.ac.id/index.php/reid/article/view/63230.