[FieldTrip] cluster-based permutation test in the time dimension

[Yoshiko Yabe]

Hi Jan-Mathijs,

Thank you for your brief response. So, the number of consecutive
samples (time points) over threshold does not matter to build a
cluster. Is my understanding correct? I would like to know the
temporal unit of cluster analysis to report the results of my study.

Best wishes,
Yoshiko


--
Yoshiko Yabe

On Fri, Nov 26, 2021 at 4:29 PM Schoffelen, J.M. (Jan Mathijs) via
fieldtrip <fieldtrip at science.ru.nl> wrote:
>
> Hi Yoshiko,
>
> I might misunderstand, but there is no way in which the size of a cluster can be defined. The extent of a cluster depends on the a priori threshold, and there’s a small knob (cfg.minnbchan)  - to avoid small bridges or corridors in space.
>
> Best wishes,
> Jan-Mathijs
>
>
> > On 26 Nov 2021, at 06:45, Yoshiko Yabe via fieldtrip <fieldtrip at science.ru.nl> wrote:
> >
> > Hi Jan-Mathijs,
> >
> > I subscribed to this mailing list today to ask a question almost same
> > as the question that was posted a few weeks ago.
> >
> > [FieldTrip] cluster-based permutation test in the time dimension
> > by Songhee Kim songhee.kim at nyu.edu
> > Thu Nov 11 01:17:37 CET 2021
> >
> > I am analyzing the data with cfg.statistic = 'ft_statfun_depsamplesT'
> > and cfg.correctm = 'cluster'.
> >
> > According to your response to Songhee, 'each sample by
> > definition only has 2 neighbours (one on either side)' in time domain,
> > Does your response mean that the minimum number of samples to build
> > a cluster is two and the minimum temporal length is defined by sampling
> > rate?
> > Maybe the question should be simplified:
> > How long in time should a cluster last?
> >
> > Yoshiko Yabe
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