Factorial ANOVA - Two-Way Independent ANOVA

Question 1

What is a Factorial ANOVA?

Answer 1

It is an independent ANOVA with two or more IVs.

Question 2

What is 3x3 design?

Answer 2

This means there are two IVs, each with three levels.

Question 3

What are the three effects found in a Two-Way ANOVA?

Answer 3

There are two main effects (one for each IV) and the interaction effect.

Question 4

What test must be used to check the homogeneity of variance?

Answer 4

Levene’s Test (should be non-significant).

Question 5

When interpreting an interaction graph: when do we know there is a significant interaction?

Answer 5

If the lines cross or are not parallel.

Question 6

Where interpreting an interaction graph: when do we know there is a non-significant interaction?

Answer 6

If the lines do not cross or are parallel.

Question 7

What is a simple effects analysis?

Answer 7

It’s a graph which breaks down the interaction effects.

Question 8

What can SPSS Syntax be used for?

Answer 8

Time saving.

Doing extra stuff (like a simple effects analysis).

Question 9

What is the general SPSS Syntax for running a simple effects analysis?

Answer 9

GLM DV by IV1 IV2

/EMMEANS = TABLES(IV1*IV2)COMPARE(IV)

Question 10

Why are significant interactions important?

Answer 10

This is because they can potentially make the main effects redundant (and can be more interesting!).