I don't know anything about it. Looks interesting. doug On 06/15/2012 02:14 PM, Caspar M. Schwiedrzik wrote: > Hi Doug, > if I filter, an alternative might be the Newey-West estimator > (http://en.wikipedia.org/wiki/Newey-West_estimator), I guess? > Caspar > > > 2012/6/15 Douglas N Greve <gr...@nmr.mgh.harvard.edu > <mailto:gr...@nmr.mgh.harvard.edu>> > > Hi Caspar, it does not make sense to low pass filter and prewhiten. > Unfortunately, I don't have the precoloring implemented in FSFAST. > doug > > On 06/15/2012 01:36 PM, Caspar M. Schwiedrzik wrote: > > Hi! > > I am processing a resting state data set, which I would like to low > > pass filter to get rid of some artifacts. The sample will be very > > small, so I won't run a RFX GLM, but an FFX GLM and/or single > subject > > analyses. > > Since the low pass filter introduces high autocorrelations, it does > > not make sense to whiten the data before the GLM. > > However, in order not to violate the assumptions of the OLS, I would > > like to use the precoloring approach described in Worsley & Friston > > 1995. Is that by any chance implemented in FSFAST, and if not, where > > would be the right place to add it? > > Thanks in advance, > > Caspar > > > > > > _______________________________________________ > > Freesurfer mailing list > > Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu> > > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu> > Phone Number: 617-724-2358 <tel:617-724-2358> > Fax: 617-726-7422 <tel:617-726-7422> > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html > <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu <mailto:Freesurfer@nmr.mgh.harvard.edu> > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > The information in this e-mail is intended only for the person to > whom it is > addressed. If you believe this e-mail was sent to you in error and > the e-mail > contains patient information, please contact the Partners > Compliance HelpLine at > http://www.partners.org/complianceline . If the e-mail was sent to > you in error > but does not contain patient information, please contact the > sender and properly > dispose of the e-mail. > >
-- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
