Re: [Erppcatoolkit-support] Using PARE correction for EEG data

[Maria T. W. <mtwijaya@u.nus.edu>]

Dear Joe,


Thank you for your quick reply. I have actually tried applying the PARE referencing to both nose-referenced and average-referenced data. In the former, it barely made any noticeable difference while in the latter it did change the grand average waveform. I am not sure why it did not work on the nose-referenced data. Is it actually okay to apply PARE referencing to a data set that has already been referenced to the average of the scalp electrodes?


Thank you.


Regards,

Maria


________________________________
From: Joseph Dien <jd...@ma...>
Sent: Friday, June 19, 2015 9:27 PM
To: Maria Teresa Wijaya
Cc: erp...@li...
Subject: Re: [Erppcatoolkit-support] Using PARE correction for EEG data

Thanks!  You do not need to re-reference first.  The PARE option is just a modified average-reference procedure (referenced to the average of the full interpolated head rather than just the average of the electrode locations).  Use the "re-reference" option in the Topomaps view to get a sense of what it is doing.

Cheers!

Joe
--------------------------------------------------------------------------------

Joseph Dien, PhD
Research Associate
Cognitive Neurology/Neuropsychology
The Johns Hopkins University School of Medicine


On Jun 19, 2015, at 01:18, Maria Teresa Wijaya <mtwijaya@u.nus.edu<mailto:mtwijaya@u.nus.edu>> wrote:

Hello,

First of all, thank you for the amazing EP toolkit. I am currently trying to make use of the PARE correction feature. My data were recorded in Biosemi (64 channels) and have been filtered and re-referenced to nose in EEGLAB.

My question is, do I have to first re-reference my data to average before using the PARE correction?

Thank you and apologize if this question is too basic.

Regards,

Maria
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