Dear Cathy,
|If one has 4 sessions and 1 trial type in each session,
|then is the contrast 1 1 1 1 the appropriate one?
Yes: this will show you the average activation (over baseline) across the
four sessions for this trial type. The reverse contrast [-1 -1 -1 -1] will
show deactivations relative to baseline.
best wishes,
Geraint
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