xxIRT (2.1.2)

Item Response Theory and Computer-Based Testing in R.


A suite of psychometric analysis tools for research and operation, including: (1) computation of probability, information, and likelihood for the 3PL, GPCM, and GRM; (2) parameter estimation using joint or marginal likelihood estimation method; (3) simulation of computerized adaptive testing using built-in or customized algorithms; (4) assembly and simulation of multistage testing. The full documentation and tutorials are at .

Maintainer: Xiao Luo
Author(s): Xiao Luo [aut, cre]

License: GPL (>= 3)

Uses: ggplot2, glpkAPI, lpSolveAPI, reshape2

Released about 1 year ago.