Unidimensional and Multidimensional Reliability Coefficients R package reliacoef version 1.0.1 Calculates and compares various reliability coefficients for unidimensional and multidimensional scales. Supported unidimensional estimators include coefficient alpha, congeneric reliability, the Gilmer-Feldt coefficient, Feldt's classical congeneric reliability, Hancock's H, Heise-Bohrnstedt's omega, Kaiser-Caffrey's alpha, and Ten Berge and Zegers' mu series. Multidimensional estimators include stratified alpha, maximal reliability, correlated factors reliability, second-order factor reliability, and bifactor reliability. See Cho (2021) <doi:10.1007/s11336-021-09801-1>, Cho (2024) <doi:10.1037/met0000475>, Cho (2025) <doi:10.1037/met0000525>. Software Depends: R (>= 3.5.0) Imports: lavaan, psych, matrixcalc, stats Suggests: knitr, rmarkdown, Rcsdp, testthat (>= 3.0.0) Eunseong Cho <bene@kw.ac.kr> Comprehensive R Archive Network (CRAN) Eunseong Cho [aut, cre] GPL (>= 3) 2026-03-05 application/tgz https://CRAN.R-project.org/package=reliacoef doi:10.32614/CRAN.package.reliacoef