I am doing a MANOVA, and I have a categorical IV with 3 levels and 2 dependent Variables. I want to see if another continuous variable acts as a moderator. Can I simply enter that variable as a covariate and run the analysis, or do I need to run separate regression models for this, while dummy coding my predictor and creating interaction terms? My apologies if this question has been asked, I searched but did not find anything.

  • $\begingroup$ Most modern stat programs allow you to include an interaction of a categorical variable and a quantitative variable without creating dummy variables (the stat program creates the variables implicitly). $\endgroup$ – David Lane Mar 9 '17 at 3:08

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