4. Mutligroup: Related

Question 1

For repeated measures ANOVA, we must test assumptions. Rather than homogeneity of variance, what must we test?

Answer 1

🔸 sphericity

It’s the variance of the different scores for any two conditions is the same for any other two conditions.

Question 2

What test can allow us to assume sphericity?

Answer 2

Mauchly’s - sphericity can be assumed if it is not significant.

Question 3

How do we report repeated measures ANOVA?

Answer 3

🔸 F value
🔸 d.f.
🔸 p value
🔸 effect size

And means for each time point
May also report Post-HOC

Question 4

What do we do if sphericity cannot be assumed (as Mauchley’s test is significant)?

Answer 4

1) Report Wilks Lambda from Multivariate test table - F value
🔸 doesn’t assume sphericity

2) Report Greenhouse Geiseer Correct
🔸 F value

Question 5

How do we report Friedman?

Answer 5

🔸 output - X^2
🔸 df
🔸 p value