title: Estimation of Parameters of the Rasch Model and Comparison of Groups in Presence of Locally Dependent Items.
abstract: Measurement specialists routinely assume examinee responses to test are independent of one another. However, previous research has shown that many tests contain item dependencies, and not accounting for these dependencies leads to misleading estimates of item and person parameters. In this paper, the marginal maximum likelihood estimation in Rasch model with the violation of the local independence is studied. The power of the Wald test on a group effect parameter on the latent traits in cross-sectional studies is examined under the local independence and the local item dependence assumptions. The different results are illustrated with simulation studies.
authors.forename: Mohand-Larbi
authors.initials: ML
authors.lastname: Feddag
authors.forename: Myriam
authors.initials: M
authors.lastname: Blanchin
authors.forename: Véronique
authors.initials: V
authors.lastname: Sébille
authors.forename: Jean-Benoit
authors.initials: JB
authors.lastname: Hardouin
mesh_terms: D003430:Cross-Sectional Studies; D016013:Likelihood Functions; D015233:Models, Statistical; D011594:Psychometrics