ltm: An R Package for Latent Variable Modeling and Item Response Analysis
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, wherea...
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| Format: | Article |
| Language: | English |
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Foundation for Open Access Statistics
2006-11-01
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| Series: | Journal of Statistical Software |
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| Online Access: | http://www.jstatsoft.org/v17/i05/paper |