Your Turn Answers

Cross out the wrong word in each sentence

1. The effect of each IV independently on the DV is called a main effect/interaction effect.

2. An easy way to think about interactions is to think of them like an addition/switch.

3. When added together, IVs can explain up to 100%/50% of the variance of a DV.

Fill in the table with the missing values

You may find it useful to look back in Section 11.4.

IV1 Effect Size

IV2 Effect size

DV Variance explained

Total DV Variance explained

Effect Size

0.15

0.6

0.152 = 0.0225

0.62 = 0.36

(0.152 + 0.62) = 0.3825

sqrt(0.152 + 0.62) = 0.62

0.3

0.1

0.09

0.01

0.10

0.32

–0.25

0.4

0.0625

0.16

0.2225

0.47