The Item Response Theory (IRT) Module

A module for analyzing the results of psychological tests using Item Response Theory (IRT).

Core Functionality

The Item Response Theory module is a graphical interface around the R package mirt and rstan.

Module Structure

The analyses in the Item Response Theory module are structured in JASP in the following way:

--- Item Response Theory
  -- Classical
    - Dichotomous Items
    - Polytomous Items
    - Classical Test Theory
  -- Bayesian
    - Dichotomous Items
    - Polytomous Items