med_summary: Tidy report of mediation analysis.

In bruceR: Broadly Useful Convenient and Efficient R Functions

Tidy report of mediation analysis.

Description

Tidy report of mediation analysis, which is performed using the mediation package.

Usage

med_summary(model, digits = 3, nsmall = digits, file = NULL)

Arguments

model	Mediation model built using mediation::mediate().
digits, nsmall	Number of decimal places of output. Default is 3.
file	File name of MS Word (.doc).

Value

Invisibly return a data frame containing the results.

See Also

PROCESS

Examples

## Not run: 

library(mediation)
# ?mediation::mediate

## Example 1: OLS Regression
## Bias-corrected and accelerated (BCa) bootstrap confidence intervals

## Hypothesis: Solar radiation -> Ozone -> Daily temperature
lm.m = lm(Ozone ~ Solar.R + Month + Wind, data=airquality)
lm.y = lm(Temp ~ Ozone + Solar.R + Month + Wind, data=airquality)
set.seed(123)  # set a random seed for reproduction
med = mediate(lm.m, lm.y,
            treat="Solar.R", mediator="Ozone",
            sims=1000, boot=TRUE, boot.ci.type="bca")
med_summary(med)

## Example 2: Multilevel Linear Model (Linear Mixed Model)
## (models must be fit using "lme4::lmer" rather than "lmerTest::lmer")
## Monte Carlo simulation (quasi-Bayesian approximation)
## (bootstrap method is not applicable to "lmer" models)

## Hypothesis: Crips -> Sweetness -> Preference (for carrots)
data = lmerTest::carrots  # long-format data
data = na.omit(data)  # omit missing values
lmm.m = lme4::lmer(Sweetness ~ Crisp + Gender + Age + (1 | Consumer), data=data)
lmm.y = lme4::lmer(Preference ~ Sweetness + Crisp + Gender + Age + (1 | Consumer), data=data)
set.seed(123)  # set a random seed for reproduction
med.lmm = mediate(lmm.m, lmm.y,
                  treat="Crisp", mediator="Sweetness",
                  sims=1000)
med_summary(med.lmm)

## End(Not run)

bruceR documentation built on March 7, 2023, 5:41 p.m.