swMATH ID: 7911
Software Authors: Rizopoulos, D
Description: ltm: an R package for latent variable modelling and item response theory analyses. The R package ltm has been developed for the analysis of multivariate dichotomous and polytomous data using latent variable models, under the Item Response Theory approach. For dichotomous data the Rasch, the Two-Parameter Logistic, and Birnbaum’s Three-Parameter models have been implemented, whereas for polytomous data Semejima’s Graded Response model is available. Parameter estimates are obtained under marginal maximum likelihood using the Gauss-Hermite quadrature rule. The capabilities and features of the package are illustrated using two real data examples.
Homepage: http://www.jstatsoft.org/v17/i05/
Related Software: R; eRm; mirt; BILOG; lme4; plink; Mplus; lordif; Mcmcpack; PARSCALE; MULTILOG; IRTPRO; psychomix; psychotools; sirt; poLCA; MICE; SAS; plRasch; TESTFACT
Cited in: 30 Publications

Standard Articles

1 Publication describing the Software Year

Citations by Year