Dear SPM'ers
I have a few more questions concerning the multisubject correlation
analysis.
Does "Covariates only: interaction with subject" model take into account
the dependence within subject?
If it does, how does it do that?
This is important because we have 8 scans per subject.
We specified the following contrasts (11 subjects) to test
1) positive correlation 1 1 1 1 1 1 1 1 1 1 1
2) negative correlation -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1.
Are these t-contrasts correct for testing the average positive and
negative correlation?
I wonder whether these results are fixed effects analyses, that cannot
be generalized into population level.
Are there theorethical references concerning the multisubject
correlation analysis with correlated scans?
We have been searching such articles, but didn't find any.
Thanks in advance
Esa Wallius, Turku PET centre, Finland
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|