The only big difference is the one you are running into, and that's that
optseq2 optimizes each run separately instead of concatenating the runs
together. You'll have to divide your 4 presentations among 6 runs, which
will create a bit of a mess because some runs won't have any of a
certain condition. You might want to stick with the old optseq.
doug
Dan Dillon wrote:
Dear FreeSurfers,
I’m having a little trouble getting something that works in optseq to
work in optseq2. Here’s what’ is going on . . . when I run this
command, things work fine and I get 6 nice sequences:
optseq -ntp 170 -TR 3 -npercond 4 4 4 4 4 4 -tpercond 17 17 17 17 17
17 -label NgReal NgLook NgPhoto NuReal NuLook NuPhoto -nsessions 6
-nruns 1 -timewindow 20 -prestim 4 -nsearch 50 -o OptseqTEST
However, when I run this command (i.e., my best translation of the
previous command into optseq2), I get an error saying that all my
schedules are ill-conditioned and I need more scan time or fewer
repetitions:
optseq2 --ntp 170 --tr 3 --psdwin 0 20 1 --ev NgReal 17 4 --ev NgLook
17 4 --ev NgPhoto 17 4 --ev NuReal 17 4 --ev NuLook 17 4 --ev NuPhoto
17 4 --nsearch 100 --nkeep 6 --o Optseq2TEST
Is this a substantive difference between optseq and optseq2 or did I
make a mistake with my optseq2 command? Also, I’m assuming there is a
reason why I should use optseq2 rather than optseq, but I don’t know
what it is. Can someone clue me in?
Thanks!
Dan Dillon, Ph.D.
Post-doctoral Fellow
Affective Neuroscience Lab
Dept. of Psychology, Harvard University
Phone: (617) 495-1889
E-mail: [email protected] <mailto:[email protected]>
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Douglas N. Greve, Ph.D.
MGH-NMR Center
[email protected]
Phone Number: 617-724-2358
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In order to help us help you, please follow the steps in:
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