Latent Class Item Response Theory (LC-IRT) Models under Within-Item Multidimensionality

Framework for the Item Response Theory analysis of dichotomous and ordinal polytomous outcomes under the assumption of within-item multidimensionality and discreteness of the latent traits. The fitting algorithms allow for missing responses and for different item parametrizations and are based on the Expectation-Maximization paradigm. Individual covariates affecting the class weights may be included in the new version together with possibility of constraints on all model parameters.


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install.packages("MLCIRTwithin")

2.1 by Francesco Bartolucci, 3 years ago


Browse source code at https://github.com/cran/MLCIRTwithin


Authors: Francesco Bartolucci , Silvia Bacci - University of Perugia (IT)


Documentation:   PDF Manual  


Task views: Psychometric Models and Methods


GPL (>= 2) license


Depends on MASS, limSolve, MultiLCIRT


Suggested by dextergui.


See at CRAN