[Eeglablist] pvaf parameter for ICA components

[Tarik S Bel-Bahar]

Hi David, Thats unusual, theres likely a problem with the data or the
setup/processing of the data. To get more thoughts from the list, it would
be good to send some graphical information about your ICs, using either the
classic or updated IC property visualizations available from the gui.

On Thu, Dec 6, 2018, 12:52 PM David Jin <david.jin at yale.edu wrote:

> Hi All,
> We have two questions about ICA with eeglab. In our current dataset, we
> are finding that the percent variance accounted for (when using eeg_pvaf)
> is negative for the majority of our components such that when summed, they
> come out to a negative percent variance accounted for. Is this a normal
> finding (and what is its significance)? Secondly, do the components with
> the maximum percent variance accounted for (found via eeg_pvaf) correspond
> to the same components with the maximum mean power of back-projection
> (output when running pop_envtopo)?
>
>
>
> Many thanks,
> David
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