Having performed an RFX 2-sample t-test on two groups (taking the con
images from condition X vs Rest for each participant), I then decided to
extract the beta values for one of the regions of significant difference
in each participant and to my surprise I found that there was no
apparent difference when looking at the data this way.
Could someone possibly shed some light on why the difference in
extracted betas does not show a significant difference when the whole
brain analysis does?
Thanks in advance,
Gordon
Gordon D. Waiter PhD CSci MIPEM CPhys MInstP
MRI Physicist
Department of Radiology
University of Aberdeen
Research MRI Centre
Lilian Sutton Building
Foresterhill
Aberdeen
AB25 2ZD
Tel: +44 (0)1224 559725
Fax: +44 (0)1224 559718
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www.abdn.ac.uk/radiology
www.abdn.ac.uk/ims/imaging/
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