A Two-Parameter IRT Model With Ability-Based Guessing: Estimation Using the Stochastic EM Algorithm
Journal of Educational and Behavioral Statistics
Published online on October 28, 2025
Abstract
Journal of Educational and Behavioral Statistics, Ahead of Print.
In this paper, we propose a two-parameter normal ogive model with ability-based guessing (2PNO-AG), which extends the one-parameter logistic AG (1PL-AG) model by allowing item discrimination parameters to vary across items. To facilitate parameter ...
In this paper, we propose a two-parameter normal ogive model with ability-based guessing (2PNO-AG), which extends the one-parameter logistic AG (1PL-AG) model by allowing item discrimination parameters to vary across items. To facilitate parameter ...