https://cran.r-project.org/web/packages/birtr
birtr: The R Package for "The Basics of Item Response Theory Using R"
R functions for "The Basics of Item Response Theory Using R" by Frank B. Baker and Seock-Ho Kim (Springer, 2017, ISBN-13: 978-3-319-54204-1) including iccplot(), icccal(), icc(), iccfit(), groupinv(), tcc(), ability(), tif(),...