[Eeglablist] Reliability

[Simon-Shlomo Poil]

Dear Norbert,

The reason the ICA  gives different results from run to run is, that it
uses a random sampling. You can simply reset the seed of the random
generator to get equal ICs on the same signal.

You can read more about selecting ICA components (for artifact rejection)
here:
http://www.nbtwiki.net/doku.php?id=tutorial:compute_independent_component_analysis#.VIeMEabEht0

Best wishes,
Simon-Shlomo Poil, Dr.
LinkedIn profile: http://ch.linkedin.com/in/simonshlomopoil/


2014-12-09 14:46 GMT+01:00 Norbert Franke <nfranke at uni-bonn.de>:

> Dear Collegues,
>
> I have a question about reliability.
>
> Fiorenzo Artoni has sent me his article:
>
>      http://www.sciencedirect.com/science/article/pii/S1053811914007526
>
> When I repeat an ICA run, the result differs.
>
> My question to the developers of EEGLAB is: Fiorenzo
> Artori talked about introducing a RELICA toolbox in
> EEGLAB. When? Will it be a plugin or an additional tool?
>
> And a question to the collegues: What do You do when the
> results differ after simply repeating an ICA run? If You
> try to delete a component after the first run, it would be
> another after the next run. How can You decide which
> component has to be deleted? How much variation is
> acceptable? What do You do when a 2d image of a component
> is exactly the same but the polarity is inverted?
>
> I am courious to Your experience, it is important for me.
>
> Yours,
>
> Norbert Franke
>
>
>
>
>
>
>
>
>
> nfranke at uni-bonn.de
> Praxis: 0049 (0)228 - 364663
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