<div dir="ltr">Dear EEGLAB list,<div><br></div><div>I'm trying to extract independent components for my ERP single trial analysis. I'm receiving these components by filtering my raw data with a low pass filter of 15 Hz and extracting trials with stimulus onset. The base line of the trials is removed by using a pre-trial of 300 ms. Non-trials are cut out before the pre-trial. All trials, i.e. non-trials and trials are z normalized and concatenated and fed to the amica [0] function. </div>
<div><br></div><div>The resulting components look like this:</div><div><a href="https://dl.dropboxusercontent.com/u/2635172/AMICA.png">https://dl.dropboxusercontent.com/u/2635172/AMICA.png</a><br></div><div><br></div><div>
As you can see many components are localized around one electrode (3,4,5,6,8,9,10,11,12, ...). Almost all of my subjects have these focused components. Is this normal or do I have a error in my setup? Any help is greatly appreciated.</div>
<div><br></div><div>[0] <a href="http://sccn.ucsd.edu/~jason/amica_web.html">http://sccn.ucsd.edu/~jason/amica_web.html</a><br></div><div><br></div><div>Regards,<br></div><div>David</div></div>