CHP. 12 - Multiple IVs

Question 1

Interaction Effect

Answer 1

Effect if 1 IV depends on the level of another IV
2 types:
- Crossover
- Spreading

Question 2

Crossover Interaction

Answer 2

opposite differences
- “X” shape

Question 3

Spreading Interaction

Answer 3

no difference to a difference
- “<” shape

Question 4

Factorial Designs

Answer 4

Used to test interactions
- 2 or more IVs are crossed

Question 5

Main Effect

Answer 5

Overall (avg) effect of 1 IV on the DV when averaging over the levels of the other IVs

Question 6

Marginal Means

Answer 6

Means for each level of IV averaging over levels of the other IV

Question 7

Main Effects vs. Interaction Effects

Answer 7

Examine differences in marginal means vs. examine differences in differences

Question 8

Independent-Groups Factorial Design

Answer 8

Separate groups for all levels of all IVs
- Both IVs are studied as independent groups (ex. 2x2 = 4 groups)

Question 9

Within-Groups Factorial Design

Answer 9

Expose all subjects to all levels of all IVs
- Both IVs manipulated within groups (ex. 2x2 = 1 group that is present w/all 4 conditions)

Question 10

Mixed Factorial Design

Answer 10

1 variable manipulated as independent groups while other is manipulated within groups

Question 11

3-Way Design

Answer 11

2x2x2