Hi,
I have read the FEAT Perfusion documentation quite a few times now, but I
still cannot figure out how to properly set up my EVs. I have a block design
task: 56s/block, 7 blocks, alternating between rest and active (start &
finish with rest).
My main issue is with EV1. It clearly states that we should be modeling
*rest* times, but that leads me to think of a block design with 0's for
active and 1's for rest. However, the sample design seems to show all 1's
for EV1. Also, what convolution should be applied? None?
I've structured EV2 as I always do to correspond to my block design. (On:
56s; Off: 56s; Convolution: Double gamma).
EV3, I chose "Interaction", and I made the mean of EV1 zero (but the min of
EV2).
Thank you,
Nicole
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