Two-way ANOVAS L9

Question 1

What is a factorial ANOVA and why is it used?

Answer 1

A factorial ANOVA has 2 IV’s with 2 or more levels of each IV (different groups)
Used as it’s less time consuming and decreased likelihood of TI error occurring

Question 2

What is a two way repeated measures ANOVA?

Answer 2

Where there is 2 IV’s and 2 or more levels of each IV (same group)

Question 3

How many F values are produced from a two way ANOVA and what are they?

Answer 3

3

F value for IV number 1
F value for IV number 2
F value for the interaction between the two IV’s

Question 4

What are main effects in regards to two way ANOVAs?

Answer 4

These are the F values for the individual Independent variables

Each IV on the DV whilst the other is ignored

Question 5

What does the 3rd F value found show?

Answer 5

It indicates whether the influence of one IV on the DV depends upon the levels of the other IV - termed an interaction effect

Worth noting that an interaction is not significant if the influence of one IV on the DV is constant across all levels of the other IV