Dear Suzanne,
It probably depends on how many conditions you have and what the effects
(i.e. contrasts) you are interested in are, see:
http://imaging.mrc-cbu.cam.ac.uk/imaging/DesignEfficiency#Mathematics_.28statistics.29
Best regards,
Guillaume.
On 28/03/17 21:28, suzanne whiston wrote:
> Dear SPM users
> I want to design an event-related experiment. The TR=2 s.We have random
> Inter-Stimulus Interval (ISI). The design is also given to be a rapid
> event-related one. How long does an ISI usually take in this situation?
>
> Best Regards
> Suzanne
--
Guillaume Flandin, PhD
Wellcome Trust Centre for Neuroimaging
University College London
12 Queen Square
London WC1N 3BG
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