Mixed ANOVA

Question 1

How many ANOVA tables are produced?

Answer 1

One for within subjects variables and interactions
One for between-subjects variables

Question 2

What assumptions need to be met for the within-subjects variable?

Answer 2

Sphericity test if IV has 3+ levels
Non-sig = assume sphericity
Sig = apply correction - greenhouse-geisser

Question 3

What assumptions need to be met for the between-subjects variable

Answer 3

Homogeneity of variance - Levines test
Non-sig = met

Question 4

What do we need if interaction is significant?

Answer 4

Interaction post hocs
Compare b-s IV separately to the w-s IV

Question 5

How do we interpret interactions?

Answer 5

Consider main effects in isolation
Consider 2-way interaction
Interaction = sig, cautious in interpreting main effects
Examine higher order effects

Question 6

How many f-ratios are there for a 3 way ANOVA?

Answer 6

7
Split into 3 main effects, 3 2-way interactions and 1 3-way interaction

Question 7

How many F-ratios are in a 4-way ANOVA?

Answer 7

15
4 main effects, 6 2-way interactions, 4 3-way interactions and 1 4-way interaction
Difficult to interpret