Can I describe a moderated effect on mediation with the moderator derived from independent variable and mediator?

14 May 2023 0 6K Report

Hello,

In a mediation model where A is the independent variable, B the dependent variable and M the mediator, I observe the following:

- when the difference between M and A is positive (based on average value for the observed group) the mediation effect is partial and positive.

- when the difference between M and A is negative (based on average value for the observed group) the mediation effect is partial and negative.

Can I integrate the difference and use it as moderator in my model and if all indicators are OK (taking care of multicollinearity issue for example), it's OK?

Thank you,

Xavier

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