dear john and dear jürgen.
thanks very much about your reply about my vbm and volumes question. with
the following questions i will state myself as a spm dummy, but i hope you
don't mind.
our group comparison (f-test) resulted in three cluster of difference. the
post-hoc t-test showed that group 1 showed less volume (t contrast -1 1). is
this assumption right?
did i understand john correctly that the unit of modulated images (the value
for each voxel) is a sort of percentage (between 0 and 1) of how much the
original voxel had to be warped? like 0.5 means the voxels has to be warped
2 times to be normalized?
i more or less understand the comments about the difficulties in extracting
the volumes from modulated vbm images. but i can't transfer this (lack of
brain power) into my data. is there any script for people like me, which
explains the procedure how to extract mean volumes of our clusters for each
group separately, to visualize the actual difference in volume?
any further help (on a dummy level) would be greatly appreciated.
any more sophisticated help also (but i am afraid i won't understand this).
markus
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