One way within subjects anova

Question 1

when do you use a one way within subject anova?

Answer 1

single within subjects variable with 3+ levels

Question 2

what test would you use if it was two levels

Answer 2

related samples t-test

Question 3

what is the non-parametric equivalent

Answer 3

Friedman

Question 4

what is the manipulation involved in one way within subjects another

Answer 4

within subjects difference between subject differences e.g. ind diffs chances factors I.e. error variance

Question 5

what does a one way within test?

Answer 5

the diff between within subjects variance is greater than error variance after controlling for between subjects variance

Question 6

assumptions of one way within subjects

Answer 6

parametric - normally distributed
ratio / interval / ordinal data
sphericity
(even if some violated, ANOVA still used as best option in terms of power)

Question 7

what is sphericity

Answer 7

equality of variances in differences between levels of the IV
e.g. A-B Var 15.75
A-C 16.42
B-C 16.01 = all relatively similar

Question 8

if we want sphericity then what do we want the test to show

Answer 8

non significant

Question 9

what do you use to illustrate the data in these anovas

Answer 9

simple line graph

error bars

Question 10

what test do we use if we violate the sphericity assumptions

Answer 10

Huynh - fendt statistic