Factorial independent ANOVA

Question 1

What sort of IV should be used in two-way ANOVAs?

Answer 1

Must be categorical (e.g. gender, religion, etc)

Question 2

What does a factorial ANOVA examine?

Answer 2

• Main effects (the effect on its own)

- Interactions (whether factors interact, if the effect of one factor is dependent on another)

Question 3

What are the advantages of factorial ANOVAs compared to one-way?

Answer 3

1. The ability to analyse interactions (e.g. drug A and B may not work independently, but do together)
2. More powerful (adding factors reduce error by accounting for variance that would e unexplained)

Question 4

What test would you use if Levene’s test is significant?

Answer 4

Games-Howell

Question 5

What test would you used if there are slight differences in number of participants in each group?

Answer 5

Gabriel

Question 6

What test would you used if there are very different numbers of participants in each group?

Answer 6

Hochberg’s GT2

Question 7

What test would you use if you had to make a few pairwise comparisons?

Answer 7

Bonferroni

Question 8

What test would you use if you had to make many pairwise comparisons?

Answer 8

Tukey