Psych

Author: William Revelle
Contact: https://cran.r-project.org/web/packages/psych/index.html
Description: An R package for personality, psychometric, and psychological research. The psych package includes functions and data sets to do classic and modern psychometrics and to analyze personality and experimental psychological data sets. The psych package has been developed as a supplement to courses in research methods in psychology, personality research, and graduate level psychometric theory. The functions are a supplement to the text (in progress): An introduction to psychometric theory with applications in R.
Analyses: DIF
System Requirements: Windows, Mac, Linux
Measurement Model: Classical
License Type: Open-Source (R)
Documentation: See http://personality-project.org/r/psych_manual.