ltm-package: Latent Trait Models for Item Response Theory Analyses
Description
This package provides a flexible framework for Item Response Theory analyses for dichotomous and polytomous
data under a Marginal Maximum Likelihood approach. The fitting algorithms provide valid inferences under Missing At
Random missing data mechanisms.Details
ll{
Package: ltm
Type: Package
Version: 0.9-7
Date: 2011-10-18
License: GPL
}
The following options are available:
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
More information as well as R script files containing sample analyses can be found in the Rwiki page of
ltm available at:
http://rwiki.sciviews.org/doku.php?id=packages:cran:ltm.References
Baker, F. and Kim, S-H. (2004) Item Response Theory, 2nd ed.
New York: Marcel Dekker.
Rizopoulos, D. (2006) ltm: An R package for latent variable modelling and item response theory analyses.
Journal of Statistical Software, 17(5), 1--25. URL http://www.jstatsoft.org/v17/i05/