[Mne_analysis] How to set the threshold in 'permutation_cluster_test'

[daniel.vandevelden at yahoo.de]

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Dear Tao,




for your purpose you should define one groups power values as the control and therefore you can get your threshold from this group. Remember the test will give you clusters, which are defined significant because it's different to your applied threshold.




Greetings 


Daniel







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On Thu, Dec 13, 2018 at 6:22 AM +0100, "Alexandre Gramfort" <alexandre.gramfort at inria.fr> wrote:










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hi,

if you use an F-test you can use: scipy.stats.f.ppf
to get a threshold based on a proba such as 0.05

We should improve our doc of the stats module. I hope
we can do this for the next release.

HTH
Alex
On Thu, Dec 13, 2018 at 5:00 AM Xia, Tao  wrote:
>
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>
> Hi all,
>     When I run 'permutation_cluster_test', I do not know how to set the threshold. some example with the value threshold=6.0, what is the meaning of this value?  I want to test whether there is a power difference between the two groups. So, my data is (n_individual,t_freqs,t_timepoint) with one channel.
>    Wish you could give me some suggestions.
>    Thanks a lot.
>    Tao
>
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