irtoys

Author: Ivailo Partchev, Gunter Maris, Tamaki Hattori
Contact: https://cran.r-project.org/web/packages/irtoys/index.html
Description: irtoys: 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.
Analyses: Item & Test Analysis; Scaling; Scoring; nonparametric IRT
System Requirements: Windows, Mac OS, & Linux
Measurement Model: IRT/Rasch
License Type: Open-Source (R)
Documentation: user manual, sample dataset