Dear SPMers,

We performed a multi-group analysis in order to test contrasts interactions between 2 groups (healthy vs patient) in a 6 conditions (N,H,A,B,C,S) PET study.

N and H are control conditions for the S activation condition

A is control condition for B and C activation condition.

The interactions we have done are: (S-N)healthy - (S-N)patients; (S-H)healthy - (S-H)patients and (C-A)healthy - (C-A)patients.

We would like to know if it is possible to combine a conjunction analysis and an analysis of the Group by Condition interaction, in order to answer the following question: for which brain regions is there a significant group by condition interaction, whether the conditions contrasted are S and N, C and A and S and H?

Thank you for your help

Jérôme

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Jérôme Redouté
CERMEP
Hôpital Neurologique
69003 LYON
Tel/Fax: 04 72 68 86 26/10
E-mail:[log in to unmask]
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