I am conducting a mediation analysis with the mediation package in R. As a result I get values for an average direct effect (ADE) and an average causal mediation effect (ACME).
In the literature such mediations are often drawn as path models in which X represents the predictor, M the mediator and Y the dependent variable. X -> Y is then called c', X -> M becomes a and M -> Y is called b.
As I see it, the ADE represents the path c'. ACME is the product of paths a and b, that is ab.
How do I get values for a and b?
Your help is much appreciated!