Hello
I am trying to conduct an analysis using TBSS to look for differences between two groups, using 2 covariates of no interest (age & gender)
I am getting no significant differences and I am surprised because I would have strongly expected some variation between these two groups
Therefore I am wondering if I have done the analysis correctly. Please could someone advice me? I have included my design matrix & contrasts below
as well as the randomise and fslview commands that I have used
I would be very grateful for any advice. Thank you very much
best wishes
Prerona
COMMANDS
randomise -i all_FA_skeletonised -o tbss -m mean_FA_skeleton_mask -d group_age_gender_demeaned.mat -t group_age_gender_demeaned.con -n 5000 --T2 -V
fslview $FSLDIR/data/standard/MNI152_T1_1mm mean_FA_skeleton -l Green -b 0.2,0.7 tbss_tfce_corrp_tstat4 -l Red-Yellow -b 0.95
(I have also tried changing the threshold to see if something comes up. There is nothing even at 0.10)
DESIGN MATRIX
/NumWaves 6
/NumPoints 67
/PPheights 1.000000e+00 1.000000e+00 2.700000e+01 2.800000e+01 1.000000e+00 1.000000e+00
/Matrix
0.000000e+00 1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -2.238800e-01 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 1.000000e+00
1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 1.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -2.238800e-01 0.000000e+00 1.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -4.223880e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 7.761200e-01 0.000000e+00 1.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 4.776120e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 1.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 1.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 1.000000e+00
1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 1.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 1.077612e+01 0.000000e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 1.000000e+00
1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 1.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 1.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -4.223880e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 1.000000e+00
1.000000e+00 0.000000e+00 -2.238800e-01 0.000000e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -2.238800e-01 0.000000e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 7.776120e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 1.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 3.776120e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 3.776120e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -4.223880e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -4.223880e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -4.223880e+00 0.000000e+00 1.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -4.223880e+00 0.000000e+00 1.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 2.776120e+00 0.000000e+00 1.000000e+00
1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -4.223880e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -2.238800e-01 0.000000e+00 1.000000e+00
1.000000e+00 0.000000e+00 7.761200e-01 0.000000e+00 1.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 7.761200e-01 0.000000e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 1.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 2.776120e+00 0.000000e+00 1.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 3.776120e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -2.238800e-01 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 2.776120e+00 0.000000e+00 1.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 7.761200e-01 0.000000e+00 1.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 2.377612e+01 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -3.223880e+00 0.000000e+00 1.000000e+00
1.000000e+00 0.000000e+00 -1.223880e+00 0.000000e+00 1.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 2.277612e+01 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 1.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 1.877612e+01 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 3.776120e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 -2.223880e+00 0.000000e+00 1.000000e+00 0.000000e+00
CONTRAST
/ContrastName1 g1>g2
/ContrastName2 g1<g2
/ContrastName3 g1
/ContrastName4 g2
/ContrastName5 age1
/ContrastName6 age2
/ContrastName7 gender1
/ContrastName8 gender2
/NumWaves 6
/NumContrasts 8
/PPheights 1.061012e+00 1.061012e+00 1.136818e+00 1.119519e+00 2.600000e+01 2.800000e+01 1.112921e+00 1.097167e+00
/RequiredEffect 1.332 1.332 1.071 0.930 3.595 3.242 1.602 1.571
/Matrix
1.000000e+00 -1.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00
-1.000000e+00 1.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00
1.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 1.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 0.000000e+00 1.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 0.000000e+00 0.000000e+00 1.000000e+00 0.000000e+00 0.000000e+00
0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 1.000000e+00 0.000000e+00
0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 1.000000e+00
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