This must be a very basic question, but I'm trying to do a 2-way repeated measures ANOVA (in Statistica and/or SPSS), and was wondering:
in what way to (re)structure my data so it is most flexible for further analyses?
what way to go in Statistica or SPSS? (univariate GLM?)
In my case:
- Subjects obtain a score (1-100) in describing (30!!) animals
- They do this 3 times, using only conceptual (C), visual (V), or auditory (A) information.
- The resulting data is currently formatted as follows, with one subject a case:
dog cat ... Sbj C V A C V A ... s1 64 78 34 61 63 39 ... s2 78 89 31 68 77 45 ... ... .. .. .. .. .. .. ...
So factors are animal {dog,cat,...} and source {C,V,A}.
I have tried a 4 variable format as well:
Sbj Animal Source Value s1 dog C 64 ...
but:
- This breaks the one-subject-per-case rule that the repeated measures ANOVA procedures in SPSS and Statistica rely on.
In either case, SPSS requires me to specify all factor-levels manually which does not work as they are not variables, and moreover involves 20 levels! (in case of animal).