chapter 9 repeated measures ANOVA

Question 1

An ANOVA in which the same individuals provide data in more than one treatment

Answer 1

Repeated Measures ANOVA

Question 2

How is our error variance different in a repeated measures ANOVA compared to a one-way ANOVA?

Answer 2

The error variance is smaller.
This is because participants act as their own control so we can remove individual variance between control and treatment groups from the sources of error.

Question 3

Major difference in assumptions required to be met between the one way ANOVA and repeated measures ANOVA

Answer 3

we no longer have to meet the independence of observations assumption as we WILL be taking measurements from the same participants more than once in multiple conditions.

Question 4

The following assumptions must be met before calculating a repeated measures test:
-normal distribution
-homogeneity of variance
-interval or ration data (DV)
AND...

Answer 4

Sphericity should be assumed.

Question 5

What test allows us to determine if sphericity is assumed

Answer 5

Mauchly’s test