Hi,
I've just run an event-related fMRI study that in which I
collected 8 "blocks" of data for each subject. Each block was a 6-minute
long scan. I'm wondering whether it is better to enter each "block" as a
separate session in the analysis (i.e., 8 sessions per subject), or to
"pool" all 8 blocks from each subject into one huge session (i.e., one session
per subject).
In the discussion list, some have recommended "pooling"
multiple sessions into one big session for each subject (9/22/98),
but others have argued that such pooling might not be a good idea
(10/15/99).
I'd appreciate any advice and, if it is possible to perform the
analysis in both ways, I'd be interested to know whether and how the
high- and low-pass filters should be set in each case.
Thanks,
Daniel Weissman
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