# Testlet Item Response Theory

## Documentation for package ‘tirt’ version 0.1.3

- DESCRIPTION file.
- User guides, package vignettes and other documentation.

## Help Pages

binary_irt | Binary (Dichotomous) Item Response Theory Estimation
ela1 | Mixed-Format English Language Arts (ELA) Assessment Data (Form 1)
ela2 | Mixed-Format English Language Arts (ELA) Assessment Data (Form 2)
equate_irt | Item Response Theory Equating / Linking
fixed_item | Fixed Item Calibration
fix_person | Fixed Person Calibration with or without Covariate
irt_trt | Joint Item Response Theory and Testlet Response Theory Estimation (Dichotomous & Polytomous)
mixed_irt | Mixed Item Response Model Estimation (Dichotomous & Polytomous)
polytomous_irt | Polytomous Item Response Theory Estimation
sim_irt | Simulate Item Response Theory Data
sim_trt | Simulate Testlet Response Theory Data (Vector Supported Version)
trt_binary | Unidimensional Binary (Dichotomous) Testlet Response Theory Estimation
trt_poly | Unidimensional Polytomous Testlet Response Theory Estimation