Dear SPMers,
Concerning SPM2 conjunctions, I would like to submit to your advices two
questions :
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A.
We would like to compare two similar fMRI studies (1st testing emotion
A, 2nd testing emotionB)
by doing conjunction analysis to get the similar components between
specific 1st level contrasts.
Both experiments :
- Have The same 2*2 design, same sequence, same # of subjects
- Have been done on the same 1.5T MRI
- have been carried out with different groups of subjects (exp1: groupA,
exp2: groupB)
We plan to use an ANOVA to see whether we can find consistent common
components
between emotion A & emotion B (controlled contrasts) in both studies.
Question A : I have doubts concerning the analyze I should use,
Conjunction or GlobalN ?
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B.
Another experiment has been carried out on three groups of subjects.
We would like to compare groups and do conjunctions as well.
Here, SPM2 proposes Conjunction, Intermediate Null or Global Null
Question B : Same
Thank you very much for your help and attention,
Swann Pichon
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