search for: desirdata

...rning how to do mediation analysis in R. Ideally, I would like to use Preacher's Bootstrapping test for mediation (Preacher & Hayes, 2004). I have attempted to use the mediate package to set this up, using code that looks basically like this: model.m <- lm(data$outcome ~ data$mediator + desirdata$predictor) model.y <- lm(data$outcome ~ data$predictor) age1 <- mediate(model.m, model.y, treat = "predictor", mediator = "mediator", conf.level=.95, boot=TRUE, sims=50) However, I get an error indicating that the number of observations doesn't match across the two m...