R package FLIRT for Flexible Item Response Theory Modeling
Source file
Manual: flirt.pdf
R script: test_flirt_version1.15_shared.R
Vignette: flirt_vignette.pdf
Readme: readme.pdf
Please read the readme.pdf for important notes on installation and usage.
Note
The current version 1.15 is based on MCR for Matlab 2014a.
To utilize this new version, users need to download/install this version of MCR.
(Versions below 1.15 need MCR for Matlab 2012b)
To cite the package
Jeon, M., Rijmen, F. & Rabe-Hesketh, S. (2014). Flexible item response theory modeling with FLIRT. Applied Psychological Methods, 38, 404-405.
Modeling Features:
- One parameter logistic (1PL) and two parameter logistic (2PL) models
- Multi-dimensional models (between-item and within-item models)
- Bifactor models
- Person covariates (latent regression)
- Item covariates (linear logistic test model)
- Multiple group analysis
- Differential item functioning analysis
- Polytomous responses (partial credit models, rating scale models, graded response models)
- Combinations of above
Version 1.15 New Features:
- Second-order models (and its extensions)
- Three parameter logistic (3PL) model (basic model)
- Item response curves for unidimensional 1PL, 2PL, and 3PL models
- Item/test information functions for unidimensional 1PL, 2PL, and 3PL models
New Examples:
For any questions, contact mjjeon@ucla.edu