ltm (1.1-1)

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Latent Trait Models under IRT.

Analysis of multivariate dichotomous and polytomous data using latent trait models under the Item Response Theory approach. It includes the Rasch, the Two-Parameter Logistic, the Birnbaum's Three-Parameter, the Graded Response, and the Generalized Partial Credit Models.

Maintainer: Dimitris Rizopoulos
Author(s): Dimitris Rizopoulos <>

License: GPL (>= 2)

Uses: MASS, msm, polycor
Reverse depends: difR, GPCMlasso, IMTest, infutil, integIRTy, irtoys, kequate, lordif, pcaPA, PCMRS, PerFit, QVM, subscore
Reverse suggests: catIrt, equateIRT, equateMultiple, latdiag, sirt, VARSEDIG

Released about 2 years ago.

14 previous versions



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