Hi Donald
> Is there anyway to add a regressor across multiple sessions?
> Currently, I am modelling the events in each session seperately to be able
> to see any changes between sessions. However, I want to have motion and
> other regressors go across session, is this possible in SPM5?
> Any thoughts would be appreciated.
>
Well this is a bad idea to put sessions all together. When you perform
the realignment you do it per session (ie images are first realigned
within sessions then between sessions). You end up with one .txt file
per session . At the 1st level in Data & Design if you have 2 sessions,
click twice on New "Subject/Session" to model each session and enter the
motion parameters in Multiple regressors. If you want to 'see' where
those regressors explain part of the signal simply add them (within and
between sessions) in the contrast manager like any other conditions. Is
that what you want to do?
Best
Cyril
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