title: Remarks and a Correction of Ligtvoet's Treatment of the Isotonic Partial Credit Model.
abstract: This note contains some remarks on Ligtvoet's (Psychometrika, 77:479-494, 2012) treatment of the isotonic partial credit model. The Proposition relating to the observable property MWI is shown to be false.
authors: Department of Pedagogical and Educational Science, University of Amsterdam, Nieuwe Prinsengracht 130, 1018 VZ, Amsterdam, The Netherlands, r.ligtvoet@uva.nl.
authors: Rudy
authors: R
authors: Ligtvoet
mesh_terms: D000465:Algorithms; D015233:Models, Statistical; D011594:Psychometrics