The goal of shortIRT is to simple tool for the development of static short test forms (STFs) in an Item Response Theory (IRT) based framework. Specifically, two main procedures are considered:
The typical IRT-based procedure for the development of STFs (here denoted as benchmark procedure, BP), according to which the most informative items are selected without considering any specific level of the latent trait
The IRT procedure based on the definition of levels of interest of the latent trait (i.e., \(\theta\) targets, here denoted as \(\theta\)-target procedure). The selected items are those most informative in respect to the \(\theta\) targets. This procedure can be further categorized according to the methodology used for the definition of the \(\theta\) targets:
You can install the development version of shortIRT from GitHub with:
# install.packages("devtools")
devtools::install_github("OttaviaE/shortIRT")