Hi,
You should use the 3-column format if your stimuli are not regular. This is the most flexible and common way of specifying the stimulus timing, and you can find information about it on the FEAT page on the FSL wiki.
All the best,
Mark
On 23 Oct 2013, at 17:53, Yashar Yousefzadeh <[log in to unmask]> wrote:
> Hello everybody,
>
> I am trying to design a model in Feat for and study, which includes 3 main phases:
>
> EV1. Instruction: during which patients are focusing at monitor with just a + sign at the middle (for concentration), duration about 2 seconds.
>
> EV2. Looking at cue pictures: during which patients are looking at the same monitors showing some pictures (generally 2 categories of pictures with + or - emotional values) duration about 10-12 seconds.
>
> EV3. Rating: during which patients rate their feelings while were looking at the pictures. this largely varies! from 8 seconds to 48 seconds
>
> So I press on FEAT Gui >> Design Tab >> Full model setup >> here I select Number of events 3
>
> then I should define Skip, on , off for each EV. it is obvious for the EV1 that Skip=0, on=2, but what should be 'off' value? (since I really don't know how long is it the duration of 3 tasks together)
>
> this gets even more difficult when comes to EV3: here I even don't know what should I specify the 'on' value
>
> Thank you,
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