mediation

http://ripl.faculty.asu.edu/mediation/ http://www.public.asu.edu/~davidpm/classes/psy536/Baron.pdf See page 1173, 1174 and 1178 the justification for a mediator is very very different compared to the justification of a moderator. Also in moderator also there are two types of issue we are looking at 1. Change Direction or 2. Change Strength of relationship. Allow the investigation of the plausibility of "third-variable explanations" for the results of past studies. When there is "inconsistency" you are looking for a possible "moderator" and when there is "consistency" you are looking for a "mediator" (mechanism).