[Eeglablist] Problems with the whiteness of the residuals

[jfochoaster .]

Thanks Makoto and Bethel

I used another criteria for order selection, the AIC, and obtained higher
orders and better results in the validation of the models

Best wishes


On Mon, Mar 24, 2014 at 7:17 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>wrote:

> Dear Bethel and John,
>
> I also often encounter this problem. It seems there is no guaranteed
> solution for this. I almost always use order == 30 with piecewise
> detrending on. Maybe you want to decrease the ICs to include (which could
> be against your experimental interest, I know...)
>
> Should we contact Tim?
>
> Makoto
>
>
>
>
> 2014-03-19 15:35 GMT-07:00 Bethel Osuagwu <b.osuagwu.1 at research.gla.ac.uk>
> :
>
>> 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
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>
>
>
> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
>



-- 
John Ochoa
Docente de Bioingeniería
Universidad de Antioquia
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