1 way repeated measures non parametric ANOVA

Question 1

what are the characteristics for a repeated measures ANOVA to be carried out?

Answer 1

continuous DV and categorical IV > within participants > violation of assumptions of paired t test > more than 2 groups > Friendman test > post hoc Wilcoxon tests if ANOVA is significant

Question 2

how are scores ranked in a within ppts design?

Answer 2

for each ppt their own scores in each conditions are ranked from lowest (1) to highest (3) > mean of ranks used for scores that are the same (1.5) > add up the sum of the ranks for each group > divide by the number in each to get the mean ranks

Question 3

what is the output from SPSS?

Answer 3

mean rank, chi square statistic, df, asymp sig (p value)

Question 4

how are the SPSS outputs written out?

Answer 4

X2 (df) = [X2 value], p = [p value]

Question 5

if the friedman’s test is significant what tests are then run?

Answer 5

non parametric wilcox on tests

Question 6

what outputs are reported for the post hoc wilcoxon tests?

Answer 6

median value, Z value, p value

Question 7

what alpha p value is used for the wilcoxon t test?

Answer 7

bonferroni corrected alpha of 0.016

Question 8

list the steps to run a repeated measures non parametric ANOVA

Answer 8

ANALYSE > NON PARAMETRIC TESTS > LEGACY DIALOGS > K RELATED SAMPLES. click on Friedman test. move each variable over to ‘test variables box’

Question 9

list the steps to run post hoc Wilcoxon tests if the ANOVA is significant

Answer 9

ANALYSE > NON PARAMETRIC TESTS > LEGACY DIALOGS > 2 RELATED SAMPLES. move variables across into pairs to have 2x test pairs. click Wilcoxon test type

Question 10

the wilcox on signed rank test output gives the mean rank for ______ and ______ pairs

Answer 10

negative, positive