dear spmers.
i performed a simple block design with 3 conditions (a,b,c). the conditions
increase in their stimulation strength and each contains 5 scans. each
condition was repeated 5 times in a pseudorandomized way, so i got 15 scans
for each condition. at the beginning i included one baseline condition of 5
scans.
my question is:
is it allowed to include the single baseline condition (bc)of 5 scans as
the rest condition in my first-level model while it contains only a fifth
of the scans of each stimulation condition?
or do all conditions which were contrasted at first-level must contain the
same number of images?
thanks in advance
markus
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