[pymvpa] BOLD delay

Yaroslav Halchenko debian at onerussian.com
Thu Feb 11 13:57:20 UTC 2016


On Thu, 11 Feb 2016, Christopher J Markiewicz wrote:

> On 02/11/2016 08:28 AM, Salim Al-wasity wrote:
> > Dears
> > When we do the classification, do we need to take into our account the
> > delay of the BOLD signal and shift our samples by 5 sec.?

> > Sincerely
> > Salim Al-Wasity
> >     PhD student
> >     University of Glasgow

> Generally speaking, you should model the the events of interest with
> hemodynamic response functions and use the beta estimates as your
> samples for classification. If you've done the HRF modeling, then
> there's no need to do an additional shift.

yeap... checkout http://www.pymvpa.org/tutorial_eventrelated.html on how
to extract GLM estimates for your conditions within PyMVPA

-- 
Yaroslav O. Halchenko
Center for Open Neuroscience     http://centerforopenneuroscience.org
Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
Phone: +1 (603) 646-9834                       Fax: +1 (603) 646-1419
WWW:   http://www.linkedin.com/in/yarik        



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