There are 2 repositories under irt topic.
Code that might be useful to others for learning/demonstration purposes, specifically along the lines of modeling and various algorithms. **Superseded by the models-by-example repo**.
Computerized Adaptive Testing Simulator
The Model Zoo of Cognitive Diagnosis Models, including classic Item Response Ranking (IRT), Multidimensional Item Response Ranking (MIRT), Deterministic Input, Noisy "And" model(DINA), and advanced Fuzzy Cognitive Diagnosis Framework (FuzzyCDF), Neural Cognitive Diagnosis Model (NCDM) and Item Response Ranking framework (IRR).
A Java library for classical test theory, item response theory, factor analysis, and other measurement techniques. It provide tools commonly used in psychometrics and operational testing programs.
Computerized Adaptive Testing with Multidimensional Item Response Theory
Kot is a basic toolkit for getting started with computerised adaptive testing (CAT) in Ruby.
Modular/extensible Julia library for Computer Adaptive Tests
IRT models using various Bayesian methods
Adapting Questions to the student ability
The goal of psymetrics is to provide tools for extracting and visualizing psychometric model fit indices. It is compatible with models created using packages like lavaan, psych, and mirt.
Visualizing and analyzing tests using (M)IRT in R. See current stable version:
Supplementary code to the paper "Computational methods for Bayesian semiparametric Item Response Theory models"
A Haskell library similar in functionality to the CAT portions of the `catIrt` R library
The oVLT: The Open Source Vocabulary Level Test
A Julia package that provides tools for psychometric data analysis.
tmt package for the application of the conditional maximum likelihood (CML) estimation in multistage designs
Multidimensional Item Response Theory R Package with C++ multi-thread implementation
Repositorio con el material del taller "Introducción a la Modelización Psicómetrica con IRT usando R" dictado por Dr. Ramsés Vázquez Lira en el Instituto Nacional para la Evaluación Educativa (INEE) como parte de la clase "Seminario de Medición y Evaluación en Educación" impartida en conjunto con la Facultad de Psicología, UNAM. Auxiliar: Josué Mendoza Arredondo.
Course-related item repsonse theory and differential course functioning.