PS I meant 4*N-(4+N)-1 (rank deficient), where N is number of subjects.
> (the error df's will be 4*N-(4+N), rather than N-1, as in the above case).
> This is not invalid; it is just less conventional.
>
> For further information, please consult:
>
> http://www.fil.ion.ucl.ac.uk/~wpenny/publications/rik_anova.pdf
>
> Rik
>
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