[Mne_analysis] Best way to apply eye blink projections with the common average

[Alexandre Gramfort]

Hi Matt,

if you don't plan to use the average ref later then indeed it's important to
compute EOG SSPs without average ref. But otherwise I don't think it
matters much.

Best,
Alex



On Wed, Aug 24, 2016 at 4:01 PM, Boggess, Matthew Jozsef
<MBOGGESS at mgh.harvard.edu> wrote:
> Hello everyone,
>
> By default, MNE seems to add an average reference projection to the raw
> data. I then noticed that when computing an eye blink EOG projection (using
> compute_proj_eog) the average reference projection gets applied prior to the
> computation of the projection. However, my intuition would be that you would
> not want to apply the average reference projection first because it will
> attenuate the eye blink artifacts and consequently make the periods where
> you estimate the eye blink noise subspace relatively less dominated by the
> eye blinks. Is there a recommended ordering to computing and applying these
> projections?
>
> Thanks in advance!
> Matt
>
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