5: Two-Way Independent ANOVA

Question 1

When is a two-way independent ANOVA used?

Answer 1

When we have multiple IVs, and want to explore the interaction between them.

Question 2

What are the three designs?

Answer 2

All IVs are between, all IVs are within, and a mix of both.

Question 3

Main effects

Answer 3

The effect of the IVs on the DV, independently of one another.

Question 4

Interaction

Answer 4

How do the IVs interact with one another?

Question 5

How are the three F statistics calculated?

Answer 5

IV1/IV2/interaction
_______________

Error

Question 6

Marginal mean

Answer 6

The average mean along one axis.

Question 7

What do parallel lines on an interaction graph mean?

Answer 7

No interaction between IVs.

Question 8

What is classic eta-squared?

Answer 8

The proportion of the total variance attributable to the factor. Partial eta-squared takes into account the variance from one IV at a time.

Question 9

What are simple effects?

Answer 9

The effect of the main IV at a single level of the secondary IV, or vice versa. Use t-tests to test significance.