ltm: AnRPackage for Latent Variable Modeling and Item Response Theory Analyses
نویسندگان
چکیده
منابع مشابه
ltm: An R Package for Latent Variable Modeling 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 obta...
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ژورنال
عنوان ژورنال: Journal of Statistical Software
سال: 2006
ISSN: 1548-7660
DOI: 10.18637/jss.v017.i05