I believe that optseq attempts to counterbalance trial conditions to an order
determined by the time window and the effective temporal resolution - hopefully
Doug can provide more details on this.
russ
ERIC ZARAHN wrote:
> Russ,
>
> What constraints are on the event-related design? That is, why
> would the program not return a blocked design (which is just a specific
> case of an event-related design) as the most efficient
> for a given minimal spacing between events (because without any other
> constraints I am quite sure that this is the solution)? Just curious.
>
> Sincerely,
> Eric
>
> >
> > on the issue of determining an optimal trial ordering for an event-related
> > design, Doug Greve at our center has a program (part of a larger suite of
> > fmri analysis tools) that will iteratively search for the most efficient
> > trial ordering and timing (based on a deconvolution model). Here is the
> > info on how to download and install his package:
> >
--
Russell A. Poldrack, Ph. D.
MGH-NMR Center
Building 149, 13th St.
Charlestown, MA 02129
Phone: 617-726-4060
FAX: 617-726-7422
Email: [log in to unmask]
Web Page: http://www.nmr.mgh.harvard.edu/~poldrack
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