[Eeglablist] ICA and eye blink component

bjj2909102003 bjj2909102003 at 163.com
Tue Aug 5 18:59:28 PDT 2014


Thank you for replying.
Actually, the problem is ADJUST. I find ADJUST sometimes doesn't detect eye blink. So I must take a look into blink component just to be sure.

Another problem is that only once ICA is enough for reject eye blink and other artifact by ADJUST? In ADJUST manual, it said ADJUST is not suitable for rerun(second) ICA.
I tried to rerun ICA simply. But the result seemed not better than the first ICA result. And the strange thing was that after the first ICA the signals were more smooth than ones after the second ICA(looked like higher sampling frequency , but the dataset size didn't change)?

Thank you!



 
From: Stephen Politzer-Ahles
Date: 2014-08-06 05:07
To: bjj2909102003
CC: eeglablist
Subject: Re: [Eeglablist] ICA and eye blink component
It does not; some participants won't show as clear a component (maybe they had fewer blinks or their blinks were less stereotypical). Sometimes it can help to record a few blinks on purpose at the beginning of the recording to use as a template.



Stephen Politzer-Ahles
New York University, Abu Dhabi
Neuroscience of Language Lab
http://www.nyu.edu/projects/politzer-ahles/


On Tue, Aug 5, 2014 at 2:53 PM, bjj2909102003 <bjj2909102003 at 163.com> wrote:
Hello,
I want to use ICA to reject eye blink. But for some subjects it is easy to find eye blink component, for others  it is hard to find blink component even I use the plugin-ADJUST. So does ICA extract eye blink component without fail??

Thanks so much!
Booer




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