User Friendly Bayesian Data Analysis for Psychology R package bayes4psy version 1.2.13 CRAN Task View: Bayesian (https://CRAN.R-project.org/view=Bayesian) Contains several Bayesian models for data analysis of psychological tests. A user friendly interface for these models should enable students and researchers to perform professional level Bayesian data analysis without advanced knowledge in programming and Bayesian statistics. This package is based on the Stan platform (Carpenter et el. 2017 <doi:10.18637/jss.v076.i01>). Software Depends: methods (>= 4.0.0), R (>= 4.0.0), Rcpp (>= 1.0.5) Imports: circular (>= 0.4.93), cowplot (>= 1.1.0), dplyr (>= 1.0.2), emg (>= 1.0.9), ggplot2 (>= 3.3.2), metRology (>= 0.9.28.1), reshape (>= 0.8.8), rstan (>= 2.26.0), rstantools (>= 2.1.1), mcmcse (>= 1.4.1), stats (>= 4.0.0), RcppParallel LinkingTo: StanHeaders (>= 2.26.0), rstan (>= 2.26.0), BH (>= 1.72.0.3), Rcpp (>= 1.0.5), RcppEigen (>= 0.3.3.7.0), RcppParallel Suggests: testthat (>= 3.0.0), rmarkdown (>= 2.5.0), knitr (>= 1.30.0) Jure Demšar <jure.demsar@fri.uni-lj.si> Comprehensive R Archive Network (CRAN) Jure Demšar [cre, aut], Grega Repovš [aut], Erik Štrumbelj [aut], Trustees of Columbia University [cph], John Kruschke [cph] (R/shared_functions.R - mcmc_hdi, src/stan_files/ttest.stan), Rasmus Baath [cph] (R/b_bootstrap.R) GPL (>= 3) 2025-07-16 application/tgz https://CRAN.R-project.org/package=bayes4psy doi:10.32614/CRAN.package.bayes4psy