Mediation and moderation

Question 1

What do you do to establish mediation?

Answer 1

1) iv must affect med and 2) dv must be affected by iv and 3) med must affect dv in last equation, if conditions hold then equation 3 iv should have less affected than 2nd equation and in perfect mediation iv has no effect when mediator is not involved

Question 2

What is centring and why do you do it?

Answer 2

Subtracting from a common value, common value is usually the grand mean of the variable, which gives cases equal to the average a score of 0

Question 3

Can non-linear data be centred?

Answer 3

No, it must be transformed into linear data before it is centred

Question 4

What is the direct effect?

Answer 4

Effect of iv on dv w/o mediator

Question 5

What is an indirect effect?

Answer 5

effect of iv on dv through the mediator

Question 6

What is full mediation?

Answer 6

when path c is not sig without the mediator

Question 7

What is partial mediation?

Answer 7

when c is reduced in magnitude/beta coefficient is smaller

Question 8

What is kappa squared?

Answer 8

mediation effect size

Question 9

What are ferguson’s effect sizes for mediation?

Answer 9

.04 or less is weak, .04-.25 is small, .25-.64 is mod, and .64 plus is large