[Eeglablist] evaluation of artifact removal performance

Colin Fera cfera2922 at sdsu.edu
Thu Jan 21 20:53:54 PST 2021


Makoto,

Thank you that is helpful and is an interesting approach to calculating SNR.

-CJ

On Tue, Jan 19, 2021 at 11:34 AM Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
wrote:

> Dear CJ,
>
> > Perspective 1 would be the performance of the removal algorithm in terms
> of
> its ability to remove artifacts and perspective 2 would be the performance
> of the removal algorithm in terms of its ability to NOT remove desired EEG
> signals.
>
> This is the open-access paper. See Suppmement 5 'Post-hoc Validation of EEG
> Preprocessing'
>
> https://urldefense.com/v3/__https://academic.oup.com/cercorcomms/article/1/1/tgaa046/5881803?login=true*supplementary-data__;Iw!!Mih3wA!SiWjbTlNQsqkf7DpBm8-F6u4RQC_9uxscQT-9yR_zYDh8ldkGMmK4yArfr951cX9KhYtew$
>
> The design is not super elaborated but as a proof of concept it may make a
> good example to start with.
>
> Makoto
>
> On Sat, Jan 16, 2021 at 8:30 PM Colin Fera <cfera2922 at sdsu.edu> wrote:
>
> > Greetings,
> >
> > Given a dataset which includes both EMG and EOG artifacts and
> > reference channels I would like to make a comparison of artifact removal
> > algorithms from two perspectives.
> >
> > Perspective 1 would be the performance of the removal algorithm in terms
> of
> > its ability to remove artifacts and perspective 2 would be the
> performance
> > of the removal algorithm in terms of its ability to NOT remove desired
> EEG
> > signals.
> >
> > The method I had in mind was to identify artifact epochs, and then
> > calculate the correlation coef between the reference channels and EEG
> > channels before and after artifact removal (for perspective 1) a lower
> > correlation should indicating better artifact removal.  Perspective 2
> would
> > be similar but instead would compare between unmodified EEG channels and
> > channels with artifacts removed except that it would be during epochs
> > without identified artifacts.
> >
> > In pursuing this, I am wondering if EEG lab has a function or plugin that
> > can identify artifacts epochs given a reference channel.
> >
> > Second question; does anyone have any recommendations for better ways to
> do
> > this?
> >
> > Thanks,
> > CJ
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