[FieldTrip] Question of implementing Fieldtrip

[Roemer van der Meij]

Hi Jinghao,

I forwarded your question to the Fieldtrip mailing list. I don't entirely
understand what you mean only saving clusters with psychological meaning.
Given the parameters that you chose, you get a certain number of clusters,
all of which are significant as a whole. In analogy, this means that the
whole 'mountain range' is significant or not, not the 'individual peaks'.
You could of course focus on a few of those clusters in your report, as
long as you mention the other clusters. You could also try to set your
parameters a little more stringent (i.e. a lower cfg.clusteralpha), this
would 'reduce the number of peaks in your mountain range', as some peaks
would then fall below the threshold. Hopefully, your clusters with
'psychological meaning' would still show up, albeit a little
smaller/shorter.

Hope this helps,
Roemer




> Well in fact I'm doing an intracranial EEG project currently where the data
> should be analyzed statistically. The permutation analysis seems a good
> choice and first I ran it with sample-specific independent t-test to get a
> rough idea of the data in different conditions.
>
> I'm wondering how to apply cluster-based permutation in single sensor
> analysis where I would like to save only the time clusters with
> psychological meaning. I could not find the guidance of how to do this in
> Fieldtrip. Could you please share with me the approach? That'll be really
> helpful.
>
> Best Regards,
> Jinghao Lu
>
>
> Dept. of Physics
> Zhejiang University
> 866 Yuhangtang Road
> Hangzhou
> 310058 ZHEJIANG
> CHINA
>
> Temporary Affiliate
> Dynamic Memory Lab
> UC Davis
>
>
> Jinghao Lu
>
>
> Dept. of Physics
> Zhejiang University
> 866 Yuhangtang Road
> Hangzhou
> 310058 ZHEJIANG
> CHINA
>
> Temporary Affiliate
> Dynamic Memory Lab
> UC Davis
>



-- 
Roemer van der Meij M.Sc.
PhD student
Donders Institute for Brain, Cognition and Behaviour
Centre for Cognition
P.O. Box 9104
6500 HE Nijmegen
The Netherlands
Tel: +31(0)24 3655932
E-mail: r.vandermeij at donders.ru.nl
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