[Eeglablist] Highly Correlated channels after applying ASR

[Makoto Miyakoshi]

Dear Vishal,

What do you see when you perform average reference? How many channels do
you have by the way? Also, what types of cap are you using? If EGI, check
if they were bridged by any chance...

Makoto

On Mon, Oct 17, 2016 at 3:08 PM, Vishal Vijayakumar <vijay059 at umn.edu>
wrote:

> Hello,
>
> Apologies if you've answered this question already, but I observe that
> data across my channels look highly correlated after applying ASR to the
> filtered EEG data. My project involves analyzing tonic thermal pain, so I
> apply ASR to 4 minute segments of the data. Because of the high
> correlation, my ICA sphering matrix is quite large in magnitude (minimum
> value of 1800) for many subjects. I also disable any channel-based
> rejection because I'd like to concatenate data across subjects for group
> ICA. My current problem persists even during single subject analysis.
>
>
> I'm not sure if I'm doing something wrong, and I'd appreciate any insight
> you can provide!
>
> Thanks,
> Vishal
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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