Hello FSL users and experts,
I know this point has been addressed several times on the list, but after
reading carefully the previous threads, I still need some clarification as
to how best to choose the high pass filter cut-off in the case of 2 block
design studies I'm working on.
In the first case, I have a classic ABAB design with the period between the
onset of 2 identical conditions varying between 52 and 60s. So, following
the manual, I was tempted to set the HPF cut-off at 60, but then recent
messages point out that the manual is not up to date and that the current
recommendation is not to go under 100
(https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0808&L=FSL&D=0&P=193438).
Should I just go with the default 100 then?
In my second study, we have a total of 6 conditions alternated in randomized
order and repeated twice within each run. Each of the 6 conditions is
presented in the first half of the block, and then a second time in the
second half of the block. The period of time between the onset of the 2
occurrences of the same condition is therefore not fixed nor predictable,
but it can be as long as 319s. In this case, should I set the cut-off at
something like 320?
Thanks a lot for any help or advice!
Best,
Stephane
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