wsMed: Within-Subject Mediation Analysis Using Structural Equation Modeling

Within-subject mediation analysis using structural equation modeling. Examine how changes in an outcome variable between two conditions are mediated through one or more variables. Supports within-subject mediation analysis using the 'lavaan' package by Rosseel (2012) <doi:10.18637/jss.v048.i02>, and extends Monte Carlo confidence interval estimation to missing data scenarios using the 'semmcci' package by Pesigan and Cheung (2023) <doi:10.3758/s13428-023-02114-4>.

Version: 1.2.0
Depends: R (≥ 4.1.0)
Imports: knitr, lavaan, semmcci, mice, semboottools, MASS, rlang, dplyr, ggplot2, methods, stats, graphics, utils
Suggests: rmarkdown, devtools, testthat, smcfcs (≥ 1.8.0)
Published: 2026-10-28
DOI: 10.32614/CRAN.package.wsMed
Author: Wendie Yang ORCID iD [aut, cre], Shu Fai Cheung ORCID iD [aut]
Maintainer: Wendie Yang <1581075494q at gmail.com>
BugReports: https://github.com/Yangzhen1999/wsMed/issues
License: GPL (≥ 3)
Copyright: see file COPYRIGHTS
URL: https://yangzhen1999.github.io/wsMed/
NeedsCompilation: no
Materials: README, NEWS
CRAN checks: wsMed results [issues need fixing before 2026-11-18]

Documentation:

Reference manual: wsMed.html , wsMed.pdf
Vignettes: Choose an analysis (source)
Working with categorical predictors (source)
Model-compatible multiple imputation (source)
Model equations: serial mediation (source)
Model equations: serial-parallel mediation (source)
Specifying user-defined mediation models (source)
Model equations: parallel mediation (source)
Model equations: parallel-serial mediation (source)
Get started: two mediation examples (source)
Comparing wsMed and MEMORE (source)
Reuse a fit: the staged workflow (source)
Plotting mediation effects and contrasts (source)
Read and export results (source)
Standardized effects (source)
Diagnostics, reproducibility, and migration (source)
Analysis options: a complete walkthrough (source)
Inspecting generated SEM syntax (source)

Downloads:

Package source: wsMed_1.2.0.tar.gz
Windows binaries: r-devel: wsMed_1.1.0.zip, r-release: wsMed_1.1.0.zip, r-oldrel: wsMed_1.1.0.zip
macOS binaries: r-release (arm64): wsMed_1.2.0.tgz, r-oldrel (arm64): wsMed_1.2.0.tgz, r-release (x86_64): wsMed_1.2.0.tgz, r-oldrel (x86_64): wsMed_1.2.0.tgz
Old sources: wsMed archive

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