Hello everyone,
I would be grateful for any replies to the following....
Is the repeated measures ANOVA classed as a parametric test?
I know that, when conducting a repeated measures analysis, there are various tests to see if specific assumptions are met e.g. when dealing with within subjects factors- Mauchly's Sphericity Test to test the null hypothesis that the variance-covariance matrix of the transformed variables (to test the effect) has covariances of 0 and equal variances; Box's M (when incorporating a between subjects factor) to test the null hypothesis that the variance-covariance matrix of the transformed variables (for a particular effect) must be equal for all levels of the between-subjects factor(s)...... but nothing seems to be ever mentioned about 'normality' or whether the repeated measures ANOVA is officially termed a 'parametric' test.
I assume that it *is* termed a parametric test as, I guess, the non parametric equivalent is the Friedman 2 way analysis of variance by ranks.
Many thanks for your views on this,
All the best,
Kim
Dr Kim Pearce PhD, CStat
Senior Statistician
Haematological Sciences
Institute of Cellular Medicine
William Leech Building
Medical School
Newcastle University
Framlington Place
Newcastle upon Tyne
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Tel: (0044) (0)191 282 0641
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