Multiple Regression Analysis - Moderator effect
4 important questions on Multiple Regression Analysis - Moderator effect
What is a moderator effect and why is it useful to include this in the analysis?
What is the procedure adding a moderator effect to the model, when it is a) metric, and b) dichotomous?
B) non metric (dichotomous); multiply IV and moderator variable
You also must include all single effects. When IV and Moderator are correlated, what should you do?
And how to assess the effects?
- View adjusted R2 and the significance of the interaction term.
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Why do you mean center the moderator variable before calculating the interaction term?
With mean-centering you check the IV value at the zero mean of the moderator variable.
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