Dear SPM'ers
If the selected contrasts for a conjunction analysis are not orthogonal,
SPM asks the orthogonalization order of contrasts.
The results seems to depend on which contrast is first in
orthogonalization order. The first contrast remains the same, but those
who are non-orthogonal regarding the first contrast change.
How to interpret the results of an orthogonalized conjunction analysis?
By the way, I already have articles "A test for a conjunction" by
Worsley and Friston and "Multisubject fMRI studies and Conjunction
analyses" by Friston et al. Are there other references concerning SPM99
style conjunctions?
Thanks,
Esa Wallius
Turku PET centre, Finland
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