Name: lordif
Price range: $$

Author: Seung W. Choi, with contributions from Laura E. Gibbons and Paul K. Cr
Contact: https://cran.r-project.org/web/packages/lordif/index.html
Description: lordif: Logistic Ordinal Regression Differential Item Functioning using IRT. Analysis of Differential Item Functioning (DIF) for dichotomous and polytomous items using an iterative hybrid of ordinal logistic regression and item response theory (IRT).
Analyses: Dimensionality; Factor/Latent Structure; Item & Test Analysis; Latent Class Models; Multidimensional Models
System Requirements: Windows, Mac, Linux
Measurement Model: IRT/Rasch
License Type: Open-Source (R)
Documentation: user manual, sample datasets

Software License

Open-Source (R)

Measurement Model

Item Response Theory; Rasch

Analysis

Dimensionality; Factor/Latent Structure; Item & Test Analysis; Latent Class Models; Multidimensional Models