Hi Everyone,
this will be a very basic question but I would really appreciate your support. (I am from a surgery background and hence a statistics newbie).
I am trying to use SPM8 for a VBM simple regression analysis: I have 30 MRI scans and 6 corresponding test scores e.g. MiniMental Test. I am trying to find a correlation between brain structure (Grey Matter) and those test scores. The way I did it:
SPM basic model: 1) Design: Multiple Regression
2) scans: grey matter smoothend MRI pics
3) Put the Mini Mental Test scores as a Vector under "covariate"
4) Estimate
Results: 1) T-contrast 0 1(where 1 is above the test scores in the design matrix ) (see attached Image)
Then this should give me a tMap of the brain showing significantly correlated areas of grey matter and Mini Mental test scores right? I get no results at all, an empty tMap (see attached pic), does this mean there is no significance whatsoever or did I do something wrong?
Thanks, I would really appreciate some feedback.
Best,
Max
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