Hi everyone! I'm doing a conditional analysis with Hayes' model 7 (moderated mediation with moderation in the first path) using Hayes' PROCESS for R. But can't seem to be able to input my multicategorical independent variable (3 groups).
I've dummy coded it, but dont know how to proceed for the PROCESS.
Thank you for your attention.
3 groups -> 2 dummy variables, x = 1 (reference), x = 2 & 3 (dummy)
library(processr)
df$D1
That's interesting, but wont PROCESS treat my categorical independent variable as a continuous variable?
(I tried coding as
data_nooutlier$D1
Didnt you read Andrew Hayes book, chapter 6? You do not have (or must not!) use as.factor on your dummy variable, but keep it numerical as it is! BUT you have to tell PROCESS that the x variabl is categorical, by adding the "mcx = 1" option to the process() command. Now PROCESS will treat your x-variable as multicategorical and proceed accordingly:
process(data = data, y = "y", x = "x", m = "m", mcx = 1, model = 4)
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