irtoys (0.2.0)

A Collection of Functions Related to Item Response Theory (IRT).

A collection of functions useful in learning and practicing IRT, which can be combined into larger programs. Provides basic CTT analysis, a simple common interface to the estimation of item parameters in IRT models for binary responses with three different programs (ICL, BILOG-MG, and ltm), ability estimation (MLE, BME, EAP, WLE, plausible values), item and person fit statistics, scaling methods (MM, MS, Stocking-Lord, and the complete Hebaera method), and a rich array of parametric and non-parametric (kernel) plots. Estimates and plots Haberman's interaction model when all items are dichotomously scored.

Maintainer: Ivailo Partchev
Author(s): Ivailo Partchev

License: GPL (>= 2)

Uses: ltm, sm, MASS, knitr
Reverse depends: CopyDetect, PerFit, subscore
Reverse suggests: catIrt, PLmixed, RndTexExams

Released about 3 years ago.