Thank you very much for the clarification! That was very helpful!
I’m assuming if that is the case, when interpreting the effects of X1 and D1, I can only talk about their effect on Y and not on how or whether they affect the interaction between X2 and D2?
Is there any way of testing whether additional variables have an affect on an interaction and how that interaction affects the dependent variable?
Excuse the many questions, I’m still very new to this and am trying to understand what different models do exactly!