Dear Leslie,
You specify the type of thresholding and relevant values when
you set up the analysis. Look in the post-stabs tab of the FEAT GUI.
All the best,
Mark
On 8 Sep 2011, at 15:58, Leslie Engineering wrote:
> It seems the zstat1* and thres_zstat1* are the same other than some threshold that has been applied ot the latter. Where is that threshold defined?
>
> Thanks and sorry to annoy
>
> On Thu, Sep 8, 2011 at 10:48 AM, David Flitney <[log in to unmask]> wrote:
> Leslie,
>
> filtered_func is not a statistical/activation map. It is fed into the GLM to calculate the statistical maps. Therefore, looking at filtered_func will not give you any insight into the structure of activation maps.
>
> HTH,
> Dave
>
> On 8 Sep 2011, at 15:40, Leslie Engineering wrote:
>
> > I guess I did and misinterpreted. It seemed if filter_func was my data after various filtering (high-pass,motion,...) and zstat is also my data just threshold to remove less statistically significant activation, should zstat overlap regions of activation from filter_fun?... just less of it?
> >
> > In my output they seem to highlight completely different regions.
> >
> > On Thu, Sep 8, 2011 at 10:34 AM, Jesper Andersson <[log in to unmask]> wrote:
> > Dear Leslie,
> >
> > I suggest you read the explanations below the picture. filter_func is very different from zstat, the former is your data after filtering. The second is the results from some statistical analysis of your data.
> >
> > Good luck Jesper
> >
> > On 8 Sep 2011, at 15:17, Leslie Engineering wrote:
> >
> >> So if I read it correctly, if I want to look at a group average image I would upload the zstatiscts image (stats/zstat1)
> >>
> >> If that is the case, I still don't understand why the image highlights very different regions than the filter_func*?
> >>
> >> Thanks so much for your help.
> >>
> >> On Thu, Sep 8, 2011 at 10:11 AM, Jesper Andersson <[log in to unmask]> wrote:
> >> Dear Leslie,
> >>
> >> have a look at this page
> >>
> >> http://www.fmrib.ox.ac.uk/fsl/feat5/output.html
> >>
> >> God luck Jesper
> >>
> >> On 8 Sep 2011, at 15:09, Leslie Engineering wrote:
> >>
> >>> For instants. If I do a group analysis looking for a basic average, how come the zstats results appear different than the filter_func when I put them in fslview.
> >>>
> >>> What is the difference between filtered_func*, cope*, varcope*, zstat*, and tstat*?
> >>>
> >>> Which will I use to look at the basic group average?
> >>>
> >>> Sorry it is such a basic question, but I have searched and can't seem to find literature that defines all the output files.
> >>>
> >>> THANKS!
> >>>
> >>> ---------- Forwarded message ----------
> >>> From: Leslie Engineering <[log in to unmask]>
> >>> Date: Thu, Sep 8, 2011 at 8:45 AM
> >>> Subject: A log of output feat files
> >>> To: FSL - FMRIB's Software Library <[log in to unmask]>
> >>>
> >>>
> >>> Is there a resource that describes the various output files from a Feat analysis (whether single subj stats or higher level group
> >>>
> >>
> >>
> >
> >
>
> --
> Dave Flitney, IT Manager
> Oxford Centre for Functional MRI of the Brain
> E:[log in to unmask] W:+44-1865-222713 F:+44-1865-222717
> URL: http://www.fmrib.ox.ac.uk/~flitney
>
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