<div dir="ltr">Dear Akshay,<div><br></div><div>When creating STUDY, you can select an (almost default) option to 1) kick out ICs whose dipole locations are outside the brain, 2) reject ICs whose dipole residual variance is > 15%. This will usually reject up to 70% of ICs, which is a good cleaning.</div><div><br></div><div>By the way rejecting 70% of ICs does not mean you reject 70% of data, since each IC has different weights on the channel EEG. ICs are sorted by the order of the variance it accounts for. For example, if you have 128 channels and 128 ICs, maybe top 20 ICs would count more than 80% of the raw data. In this case, rejecting the remaining 108 ICs means to reject 20% of data in variance. 1st IC could have more than 100 times variance than the 128th IC.</div><div><br></div><div>Makoto</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Oct 31, 2015 at 5:14 AM, Akshay Maggu <span dir="ltr"><<a href="mailto:akshaymaggu86@gmail.com" target="_blank">akshaymaggu86@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi all, <div><br></div><div>Wanted to know if the sample data for STUDY available at <a href="ftp://sccn.ucsd.edu/pub/5subjects_full.zip" target="_blank">ftp://sccn.ucsd.edu/pub/5subjects_full.zip</a> consists of data after removal of non-neurophysiological ICs (from each subject)? </div><div><br></div><div>In short, is it recommended to clean-up data for each subject using ICA, before putting in STUDY or could it also be done within STUDY?</div><div><br></div><div>Thanks in advance,</div><div>Akshay<span class="HOEnZb"><font color="#888888"><br>-- <br><div><div dir="ltr"><div><div dir="ltr">Akshay Raj Maggu, <div>PhD Candidate, </div><div>Laboratory for Language, Learning and the Brain,</div><div>Department of Linguistics and Modern Languages, </div><div>The Chinese University of Hong Kong, </div><div>Hong Kong.</div><div>Webpage: <a href="http://www.cuhk.edu.hk/lin/new/people/students/maggu/" target="_blank">http://www.cuhk.edu.hk/lin/new/people/students/maggu/</a></div><div><i>Save trees.. Save life! Please don't print this email unless you really need to.....</i></div></div></div></div></div>
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