[FieldTrip] testing if power is significantly different from zero

[Constantino Méndez Bértolo]

Bump,
wishing that some sage fieldtripper either back-up the "t-test against
homologue data filled with zeros method" or suggests a better approach,
thx


2014-07-17 13:56 GMT+02:00 Lam, Nietzsche <n.lam at fcdonders.ru.nl>:

> Hi Hweeling,
>
> I think the approach is similar to testing two different conditions. I
> have a suggestion below, but I think some people would argue that this is
> not a good way to do the test.
>
>  You can keep the design matrix the same as comparing two conditions, but
> for the "zero" condition, you will turn this all into zeros.
> dat1.powspctrm = %power from your condition of interest
> dat2 = dat1      % your "zero" condition"
> dat2.powspctrm(:) = 0; % making the data structure identical to condition
> of interest but everything is zero.
> Then call your statistics function as before.
>
> Perhaps someone else can give you more detail on this.
>
> Nietzsche
>
> ----- Original Message -----
> > From: "Hwee Ling Lee" <hweeling.lee at gmail.com>
> > To: "FieldTrip discussion list" <fieldtrip at science.ru.nl>
> > Sent: Thursday, 17 July, 2014 1:26:59 PM
> > Subject: [FieldTrip] testing if power is significantly different from
> zero
> > Hi all,
> >
> >
> > I have a naive question regarding cluster statistics in fieldtrip.
> >
> >
> > Is it possible to run a statistical analysis to test if power is
> > significantly different from zero? If so, how do I build the design
> > matrix for this case?
> >
> >
> > Thanks.
> >
> >
> > Cheers,
> > Hweeling
> >
> >
> > _______________________________________________
> > fieldtrip mailing list
> > fieldtrip at donders.ru.nl
> > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>
> --
> Nietzsche H.L. Lam, MSc
> PhD Candidate
>
> Max Planck Institute for Psycholinguistics
> Wundtlaan 1, 6525 XD Nijmegen, The Netherlands
>
> Donders Institute for Brain, Cognition and Behaviour,
> Centre for Cognitive Neuroimaging,
> Kapittelweg 29, 6525EN Nijmegen, The Netherlands
>
> n.lam at fcdonders.ru.nl
> +31-24-3668219
>
>
> neurobiologyoflanguage.com
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>



-- 
Constantino Méndez-Bértolo
Laboratorio de Neurociencia Clínica, Centro de Tecnología Biomédica (CTB)

Parque Científico y Tecnológico de la UPM, Campus de Montegancedo

28223 Pozuelo de Alarcón, Madrid, SPAIN
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