Hello,
The 7.71E02 value in the 1st column of the design looks a little out of place - is this subject meant to be weighted differently?
Many Regards
Matthew
> Dear FSL experts,
> I'm trying to run a study on the correlation of FA and neuropsychological data based on tbss. I'm a bit puzzled about my results, because all of the results are systematically opposite to my hypotheses (I assumed that better neuropsychological results accompany with a higher FA value, but it is the other way around with all variables). Hence I assume something like a sign error in my data.
>
> I demeaned the neuropsychology data in this way: single value minus mean of the values of all subjects.
>
> With glm_gui I created the following files:
>
> 01.con
>
> /ContrastName1 pCorr
> /ContrastName2 nCorr
> /NumWaves 2
> /NumContrasts 2
> /PPheights 6.000000e+00 6.000000e+00
> /RequiredEffect 5.564 5.564
>
> /Matrix
> 0.000000e+00 1.000000e+00
> 0.000000e+00 -1.000000e+00
>
>
> 01.mat
>
> /NumWaves 2
> /NumPoints 16
> /PPheights 7.710000e+02 2.005000e+01
>
> /Matrix
> 7.710000e+02 1.080000e+01
> 1.000000e+00 -2.500000e-01
> 1.000000e+00 -8.250000e+00
> 1.000000e+00 -9.250000e+00
> 1.000000e+00 -1.250000e+00
> 1.000000e+00 3.750000e+00
> 1.000000e+00 -9.250000e+00
> 1.000000e+00 2.750000e+00
> 1.000000e+00 5.750000e+00
> 1.000000e+00 -8.250000e+00
> 1.000000e+00 6.750000e+00
> 1.000000e+00 5.750000e+00
> 1.000000e+00 4.750000e+00
> 1.000000e+00 -1.250000e+00
> 1.000000e+00 -5.250000e+00
> 1.000000e+00 2.750000e+00
>
>
> I ran randomise with the following command
>
> randomise -i all_FA_skeletonised.nii.gz -o 01 -d 01.mat -t 01.con -m mean_FA_skeleton_mask.nii.gz -n 500 --T2
>
>
> Do you have any suggestions what I could have mixed up?
>
> Thanks a lot for your kind help!
>
> Cheers,
> Antonius
>
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