Hello FSL experts,
I would like to analyze DTI maps in a group of patients (N=41) scanned in three different time-points (baseline, after 24 months, after 48 months).
I would like to know if I have differences across the three time-points (Baseline vs TP1) (Baseline vs TP2), and (TP2 vs TP3).
I think that I have to use Repeated measures ANOVA but I am not sure.
I am also not sure about the matrices that I have to use for Randomise.
I have attached the matrices that I would like to use.
Please, can someone helps me to understand if repeated measures ANOVA and my matrices are fine?
Second question:
In the webpage of Repeated measures ANOVA (https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/Randomise/UserGuide#Repeated_measures_ANOVA) There is an example with 1-factor 4-levels (Repeated Measures). My case should be 1-factor 3-levels (Repeated Measures).
I do not understand why the three t-contrasts for the categorical effect are
0 0 1 0 0
0 0 0 1 0
0 0 0 0 1
Therefore only for the first 3 levels (and not for all 4!).
Thanks,
Maurizio
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