> During multiple regression analyses in VBM, I would like to look at the
> contribution of the interaction term of two or more variables. Is there a
> way to do this using contrasts (t or F)? Or is there another procedure?
You need to ensure that the interraction is modelled in the design matrix.
If you have done this, then you can specify a contrast for identifying
regions where there is a significant interaction.
Best regards,
-John
--
Dr John Ashburner.
Functional Imaging Lab., 12 Queen Square, London WC1N 3BG, UK.
tel: +44 (0)20 78337491 or +44 (0)20 78373611 x4381
fax: +44 (0)20 78131420 http://www.fil.ion.ucl.ac.uk/~john
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