Chap 6: True Experiments, Factorial Design

Question 1

What is a factorial design?

Answer 1

Two or more variables (IVs/factors) are employed in such a way that all possible combinations of selected values of each are used.

Question 2

What are some examples of factorial designs?

Answer 2

2 X 2 factorial design (2 factors, 2 levels for each factor)

2 X 3 factorial design (2 factors, 1 factor with 2 levels, 1 factor with 3 levels)

2 X 2 X 2 factorial design (3 factors, 2 levels for each factor)

Question 3

What is a main effect?

Answer 3

The average effect of one IV on the DV, holding all other IVs constant.

Question 4

What is an interaction?

Answer 4

If there is a presence of a difference in the differences of the main effect, or whether the effects of one IV on the DV changes at different levels of another IV.

Question 5

What are the different categories of interactions?

Answer 5

Antagonistic interaction

Synergistic interaction

Ceiling effect interaction

Question 6

What is an antagonistic interaction?

Answer 6

When 2 IVs reverse each other’s effects.

Question 7

What is a synergistic interaction?

Answer 7

When 2 IVs reinforce and strengthen each other’s effects.

Question 8

What is a ceiling effect interaction?

Answer 8

When one IV has a smaller effect when paired with higher levels of the second IV.

Question 9

What is a mixed-factorial design?

Answer 9

When 1 factor requires to be tested with a between-subjects design and the other factor with a within-subjects design.