By default, optseq uses an internal clock synchronize to the TR (so
events can only start on the TR). This can be changed by setting dPSD
(eg, to 1). This would allow the NULL events to be multiples of 1
instead of 2. The PSD is specified in seconds.
doug
SHAHIN NASR wrote:
> optseq2 --ntp 132
What is your command line?
SHAHIN NASR wrote:
>
> Thanks Doug.
> In my experiment, each trial (event) consists of 1 sec stimulus
> presentation and 5 sec blank interval (TR=2). I have also added a
> condition with just blank presentation which will be repeated as much
> as other eve
Thanks Doug.
In my experiment, each trial (event) consists of 1 sec stimulus
presentation and 5 sec blank interval (TR=2). I have also added a condition
with just blank presentation which will be repeated as much as other events.
I have used optseq2 commands to generate the trial seque
Hi Shahin, there are several ways to answer this question. If you are
going to analyze assuming a shape to the HRF, then the actual delay
between stimuli is technically not important (though 4s will be good to
avoid attenuation in the following stimulus). If you're using an FIR
model of the HRF
Hi Surfers,
It is my first experience with Event-related paradigms. In my
experiment, trials take minimum 6s (TR=2s). I wonder what is the optimum
variable delay between trials to be able to analyze data without any
confound.
Regards
--
Shahin Nasr
PhD in Cognitive Neuroscience
Martinos Ima
