Within Subjects ANOVA

Question 1

Within Subjects ANOVA

Answer 1

Test that compares 3 different scores from the same population

Question 2

Ordered v. Unordered Means

Answer 2

Ordered: Conditions are presented in the same order to each participant

Unordered: All conditions are presented to each participant but in random order

Question 3

Assumptions for Within Subjects ANOVA

Answer 3

Formal:
-Normality
–Each condition should have a normal distribution
-Sphericity
–Variance of the differences between all condition pairs should be equal
–Use Mauchly’s to test
–If p< 0.05 then use the Greenhouse Geisser correction
–P-value over 0.05 assumes spericity

Question 4

Sum of Squares Subjects

Answer 4

How much do the subject means differ from the grand mean

Question 5

Sum of Squares Time

Answer 5

Variability between the different conditions/time points

Question 6

Sum of Squares Within

Answer 6

How much does each score differ from their respective group means

Question 7

Sum of Squares Error

Answer 7

After accounting for the subject variance and all the within variance, the sum of squares error is what is left over

Question 8

Omega Squared

Answer 8

You know this buddy

Question 9

Why is Within more powerful than between

Answer 9

Less Error: Since you are using the same people, you remove the differences between groups

-Fewer Participants needed to find effect

-More efficient