Insu PaekABDULLAH AHMED S ALGHAMDI2022-06-012022-06-0135634https://drepo.sdl.edu.sa/handle/20.500.14154/55469THE IMPACT OF UNBALANCED DESIGNS ON THE PERFORMANCE OF PARAMETRIC AND NONPARAMETRIC DIF PROCEDURES: A COMPARISON OF MANTEL-HAENSZEL, LOGISTIC REGRESSION, SIBTEST, AND IRTLR PROCEDURESThesis