Hello,
I have a two questions about 2by2 ANOVA in FSL
(http://www.fmrib.ox.ac.uk/fsl/feat5/detail.html)
1) could somebody please clarify when to use fixed effects and when
random effects for a 2by2ANOVA?
Am I correct that fixed effects will be till used only for analysis
of a single subject whereas random effects are used for a group
analysis?
2) if I would run the random effects
(fslmaths fstat1 -div fstat3 fstata
fslmaths fstat2 -div fstat3 fstatb
ftoz -zout zfstata fstata 1 1
ftoz -zout zfstatb fstatb 1 1
You could then do thresholding on zfstata and zfstatb with easythresh.)
I get new outputs: zfstata, zfstatb, fstata, fstatb, and redered_grot.
But I'm not getting any new cluster zstat reports or thresholded
zstats. Where I can see what are the significant clusters? (I guess
the cluster zstat and tresholded zstat are for the fixed effects part
that is done before - viz " In order to carry this out, first run FEAT
using the above - FE - design.")
Many thanks for your explanation,
Klara
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