mediation analysis

Question 1

what is mediation?

Answer 1

focuses on why or how two or more variables are related- the process by which on variable effects another
the effect of x on y may be partially or wholly the result of m

Question 2

what scales are the measured on?

Answer 2

m and y are outcomes so measured on a continuous scale whereas x may be either continuous or categorical

Question 3

diagram

Answer 3

x is predictor, y is criterion and m is mediator
a is direct effect of of predictor on mediator
b is direct effect of mediator on criterion controlling for predictor
c is direct effect of predictor on criterion controlling for mediator