Dear FSL Experts,

I know that similar questions have been already answered many times, but I could not find any satisfactory conclusions on the forum.

I was trying to run 2x3 repeated measures ANOVA (i.e. 3 groups, 2 timepoints, all subjects have complete data) in FEAT. Since this design is not mentioned in the GLM manual page, I tried to combine two other designs: the factors effect approach (http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/GLM#ANOVA:_2-factors_2-_.26_3-levels_.282x3_between-subjects_ANOVA.29) and mixed effects ANOVA (http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/GLM#ANOVA:_2-groups.2C_2-levels_per_subject_.282-way_Mixed_Effect_ANOVA.29).

Unfortunately, the Feat complains about rank deficiency. Is there a way to model such a study design? My second guess would be to get the within-subject contrasts using a FE analysis and then run simple T-test. My original design matrix is attached.

Thanks for any ideas!

Kind regards

Pavel

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-- MUDr. Pavel Hok
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-- Laboratoř funkční magnetické rezonance
-- Neurologická klinika
-- Lékařská fakulta
-- Univerzita Palackého v Olomouci
-- Fakultní nemocnice Olomouc
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-- Laboratory of functional magnetic resonance imaging
-- Department of Neurology
-- Faculty of Medicine and Dentistry
-- Palacky University Olomouc
-- University Hospital Olomouc
-- Czech Republic
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-- I.P. Pavlova 6, 775 20 Olomouc
-- web: fmri.upol.cz
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