'Johnson-Neyman plot for moderated mediation
I have a relatively simple moderated mediation model which looks like this (all continuous variables):
When I've done moderation analyses in the past I've created Johnson-Neyman plots using the Interactions package to display the values of the moderator at which the slope of the predictor changes between non-significant and significant.
I'm now trying to create something similar with the current model. Figure 3 in this paper suggests it is possible to create such a plot in mod-med models but I'm not sure how they did it. In past plots I've specified the moderator and predictor and referred to a linear model (lm) but I don't think that approach is right this time...
Any guidance would be really helpful.
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