Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Conditions for Rasch-Dichotomizability of the Unidimensional Polytomous Rasch Model
View through CrossRef
Jansen and Roskam (1986) discussed the compatibility of the unidimensional polytomous Rasch model with dichotomization of the response continuum. They derived a rather strict condition in which dichotomization of multicategory data that fit the unidimensional polytomous Rasch model, results in dichotomous data which fit the dichotomous Research model with effectively the same subject parameter. In this paper a more general dichotomization condition is derived for the polytomous Rasch model, which appears less restrictive, but upholds that the intrinsic logic of the unidimensional polytomous Rasch model defies dichotomization in general. The robustness of dichotomous analysis investigated in a simulation study. It shows a close relation with the two-parameters (Birnbaum) model. Theoretical and methodological implications are discussed.
Title: Conditions for Rasch-Dichotomizability of the Unidimensional Polytomous Rasch Model
Description:
Jansen and Roskam (1986) discussed the compatibility of the unidimensional polytomous Rasch model with dichotomization of the response continuum.
They derived a rather strict condition in which dichotomization of multicategory data that fit the unidimensional polytomous Rasch model, results in dichotomous data which fit the dichotomous Research model with effectively the same subject parameter.
In this paper a more general dichotomization condition is derived for the polytomous Rasch model, which appears less restrictive, but upholds that the intrinsic logic of the unidimensional polytomous Rasch model defies dichotomization in general.
The robustness of dichotomous analysis investigated in a simulation study.
It shows a close relation with the two-parameters (Birnbaum) model.
Theoretical and methodological implications are discussed.
Related Results
Rasch analysis of the Fatigue Severity Scale in multiple sclerosis
Rasch analysis of the Fatigue Severity Scale in multiple sclerosis
Background The 9-item, Fatigue Severity Scale (FSS-9) has been widely used as an outcome measure in multiple sclerosis (MS). Modern psychometric theory, in the form of the Rasch m...
The assessment of procedural skills in physiotherapy education: a measurement study using the Rasch model
The assessment of procedural skills in physiotherapy education: a measurement study using the Rasch model
Abstract
Background
Procedural skills are a key element in the training of future physiotherapists. Procedural skills relate to the acquisition of appropriate motor skills, which a...
The Rasch wars: The emergence of Rasch measurement in language testing
The Rasch wars: The emergence of Rasch measurement in language testing
This paper examines the uptake of Rasch measurement in language testing through a consideration of research published in language testing research journals in the period 1984 to 20...
Establishment and Application of the Multi-Peak Forecasting Model
Establishment and Application of the Multi-Peak Forecasting Model
Abstract
After the development of the oil field, it is an important task to predict the production and the recoverable reserve opportunely by the production data....
Parsimonious item response theory modeling with different link functions
Parsimonious item response theory modeling with different link functions
[EMBARGOED UNTIL 6/1/2023] Traditional item response theory (IRT) models assume a symmetric error distribution and rely on symmetric (logit or probit) link functions to model the r...
Implied probabilities of polytomous response functions for model-based prediction and comparison
Implied probabilities of polytomous response functions for model-based prediction and comparison
Polytomous response models are typically motivated by assumptions about specific dichotomizations. We build on this by considering a broader range of dichotomizations. We first enu...
A Tutorial on Unidimensional Unfolding: From Automatic Item Generation to Insightful Inferences
A Tutorial on Unidimensional Unfolding: From Automatic Item Generation to Insightful Inferences
Unfolding theory maps individuals and stimuli into a common latent space, reflecting preferences through proximity. Unlike traditional psychometric methods, unfolding models are co...
Validez estructural y convergente de la escala de engrandecimiento marital en México
Validez estructural y convergente de la escala de engrandecimiento marital en México
La tendencia a exagerar las cualidades positivas de la pareja e ignorar sus defectos se denomina en- grandecimiento, representa una variable importante para el estudio de la pareja...