Data Analysis and Parameter Estimation Using Item Response Theory
Estimation of the 3PL model
Estimation of the Generalizaed Partial Credit Model
Estimation of the Graded Response Model
Estimation of the Mixed Format Model
Helper Functions
3-parameter-logistic model
Generalized Partial Credit Model
Graded Response Model
Mixed-format model
Utility functions
Parameter estimation, computation of probability, information, and (log-)likelihood, and visualization of item/test characteristic curves and item/test information functions for three uni-dimensional item response theory models: the 3-parameter-logistic model, generalized partial credit model, and graded response model. The full documentation and tutorials are at <https://github.com/xluo11/Rirt>.