polycor

Author: John Fox
Contact: https://cran.r-project.org/web/packages/polycor/index.html
Description: polycor: Polychoric and Polyserial Correlations. Computes polychoric and polyserial correlations by quick two-step methods or ML, optionally with standard errors; tetrachoric and biserial correlations are special cases.
Analyses: Item & Test Analysis; Scoring; Simulation/Resampling; Test Construction & Administration
System Requirements: Windows, Linux, or Mac
Measurement Model: Utilities
License Type: Open-Source (R)
Documentation: user manual