Al-Owaidi*, D.A.M. and **Al-Bursan, P.D.I. bin S. 2025. Effect of Sample Size and Test Length on Item Parameter Estimation Accuracy according to Generalized Partial Credit Model and the Delta Scoring Model. Arts for Educational & Psychological Studies. 7, 2 (Jun. 2025), 89–125. DOI:https://doi.org/10.53285/artsep.v7i2.2628.