Dear SPM'ers
I understand how to mask in a first level analysis and also how to perform
a second level anlsysis without masking, but I cannot figure out how to
perform masking in a second level analysis. Specifically should I
a) Do the masking in the first level analysis and then import the results
into the 2nd level analysis
or
b) Perform a 2nd level analysis to construct the mask which I then use in
a further second level analysis.
I need to know which method (i.e. a or b) is better and also how to
perform the better method.
Many thanks in advance for any help you may be able to give me.
Piers
Piers Howe, PhD
Harvard Medical School
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