xxIRT (2.1.2)

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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 11 months ago.

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