yes, my mistake
doug
On 03/05/2013 01:30 PM, Cesar Echavarria wrote:
> Also, did you mean ' fir 4 26' in your previous response? since the
> TimeWindow parameter should include the 'PreStimulus' time
> (I just want to double check since this is crucial to my question)
>
> Cesar
>
>
> On Tue, Mar
Hi Cesar, you cannot really do the analysis you want to do, it is
mathematically impossible. If you do not expect a response from one of
the conditions, then you could code it as 0. Alternatively, you can
consider both conditions as a single 20 sec event and get the FIR for
that event out to 2
Also, did you mean ' fir 4 26' in your previous response? since the
TimeWindow parameter should include the 'PreStimulus' time
(I just want to double check since this is crucial to my question)
Cesar
On Tue, Mar 5, 2013 at 1:00 PM, Douglas N Greve
wrote:
>
> If you presented the stimulus for 1
Does the post-stimulus period have to be as long as 12 seconds? With such a
long time window I get the following error when running selxavg3-sess:
XCond = 1.47995e+18 (normalized)
ERROR: design is ill-conditioned
To clarify: in our design we have 10 seconds of condition 1 followed
immediately aft
If you presented the stimulus for 10sec, then you should set the time
window to include about 12 sec after stimulus offset. If your stimulus
is 10 secand you want the time window to start 4 sec prior to onset and
go 12 sec after onset, then you will need a time window of
4+10+12=26sec, so it w
Hi Cesar, for your case, it would correspond to 4sec prior to stimulus
onset (the TR that goes from -4 to -3 sec). What seems to be wrong? The
last frame would be the TR that goes from +9sec to +10 sec. Not related
to your question, but Is 10 sec post stimulus long enough?
doug
On 03/05/2013 1
Hi Freesurfers,
I did an FIR analysis to get the BOLD response over time, the following way
mkanalysis-sess -analysis Afterimage_FIR2.rh -surface self rh -native
-fwhm 5 -paradigm ShapeAE_New.par -event-related -polyfit 1 -mcextreg -TR
1.000 -nconditions 8 -force -fsd bold -fir 4 14
I then ge
