[Eeglablist] Problems with the whiteness of the residuals

[Bethel Osuagwu]

Hi
What model order and window size are you using? You might need to give more details about your pre-processing steps including whether you are working with IC or sensors and the use of spatial filters. If your model order is too low for a given window size then your data will not be modeled properly and the residuals will not be white. So you might try using higher model orders but without over fitting. 

Bethel
________________________________________
From: eeglablist-bounces at sccn.ucsd.edu [eeglablist-bounces at sccn.ucsd.edu] On Behalf Of jfochoaster . [jfochoaster at gmail.com]
Sent: 18 March 2014 03:30
To: eeglablist
Subject: [Eeglablist] Problems with the whiteness of the residuals

eeglab experts,

I am working with ECoG data in eeglab using the SIFT plugin. When I am validating the model I obtain good consistency, above the 90%, good model stabilty, 100% stable, but bad whiteness of the residuals, none of the windows are white

What I can do with these results?

My data are adquired with the subject in resting, 240 Hz of sampling frequency, 16 channels, around 80 epochs of 2 seconds

I really appreciate any help you can provide

Best,
--
John Ochoa
Docente de Bioingeniería
Universidad de Antioquia