10: MMR

Question 1

True or false: main effects and interactions are independent in regression.

Answer 1

False, interpretation of coefficients changes based on whether or not there is an interaction.

Question 2

What does scaling of variables change?

Answer 2

Interpretation.

Question 3

What does scaling of variables NOT change?

Answer 3

The fundamental fit of the model.

Question 4

M = 0, but 0 is not included in many scales, how can this be solved?

Answer 4

Mean-centering.

Question 5

What is mean-centering?

Answer 5

Turning continuous variables into deviation scores before using them as interaction terms.

Question 6

What happens if, in a sequential regression, a conditional effect is non-significant?

Answer 6

The moderator is not needed, and can be excluded from analysis and interpretation.

Question 7

What are simple slopes?

Answer 7

The coefficient for the IV on the DV for a given level of the moderator.

Question 8

Which 3 points does the “pick-a-point” approach use?

Answer 8

1SD above the mean, 1SD below the mean and (sometimes) the mean.

Question 9

What 3 ranges does the Johnson-Neyman approach provide?

Answer 9

Range of significant slopes, range of non-significant slopes, further range of significant slopes in the opposite direction.

Question 10

What 3 effects does simple moderation consider?

Answer 10

X, M, and XM.