Mediation Analysis Confidence Intervals R package RMediation version 1.6.1 Computes confidence intervals for nonlinear functions of model parameters (e.g., product of k coefficients) in single-level and multilevel structural equation models. Methods include the distribution of the product, Monte Carlo simulation, and bootstrap methods. It also performs the Model-Based Constrained Optimization (MBCO) procedure for hypothesis testing of indirect effects. References: Tofighi, D., and MacKinnon, D. P. (2011). RMediation: An R package for mediation analysis confidence intervals. Behavior Research Methods, 43, 692-700. <doi:10.3758/s13428-011-0076-x>; Tofighi, D., and Kelley, K. (2020). Improved inference in mediation analysis: Introducing the model-based constrained optimization procedure. Psychological Methods, 25(4), 496-515. <doi:10.1037/met0000259>; Tofighi, D. (2020). Bootstrap Model-Based Constrained Optimization Tests of Indirect Effects. Frontiers in Psychology, 10, 2989. <doi:10.3389/fpsyg.2019.02989>. Software Depends: R (>= 4.1.0) Imports: checkmate (>= 2.1.0), cubature (>= 2.1.0), graphics (>= 4.1.0), grDevices (>= 4.1.0), lavaan (>= 0.5-20), MASS (>= 7.3), methods, S7 Suggests: knitr, medfit (>= 0.2.0), OpenMx (>= 2.13), rmarkdown, testthat (>= 3.0.0) Davood Tofighi <dtofighi@gmail.com> Comprehensive R Archive Network (CRAN) Davood Tofighi [aut, cre] (ORCID: <https://orcid.org/0000-0001-8523-7776>) GPL (>= 3) file LICENSE (https://CRAN.R-project.org/package=RMediation/LICENSE) 2026-07-21 application/tgz https://CRAN.R-project.org/package=RMediation doi:10.32614/CRAN.package.RMediation en-US