[FieldTrip] doublecheck significance cfg.alpha and cfg.clusteralpha

Roemer van der Meij r.vandermeij at donders.ru.nl
Fri Jan 28 14:32:56 CET 2011


> This is not correct. Actually, cfg.alpha is superfluous. In the output,
> every cluster has a p-value assigned to it, and if there is one or more
> cluster with a p-value less than your critical alpha-level (mostly 0.05 for
> a one-sided and 0.025 for a two-sided test), then you have found a
> significant difference.
>
It does affect the output.mask field, which can be used for plotting. 
This will have a 0 for a time-frequency-channel triplet if its p-value 
is above cfg.alpha, and a 1 when it is below it. Other than that, it is 
superfluous.


Best,
Roemer


-- 
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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