<div dir="ltr"><div>Hi Aaron (i see Stephen just wrote a similar response)</div><div><br></div><div>Those component topoplots look pretty good to me. In the FT one, I would say the first and third have a good change of being related to eyeblinks, and the fifth and twenty-fifth to eye-movements.</div>
<div>However, you should really look at the timecourses to identify them as related to saccades and blinks, and by comparing them with your EOG recording.</div><div><br></div><div>Although each ICA will *always* give you different results (if you don't specifiy the random seed), to make them more comparable you could add the EOG channel to the layout. </div>
<div><br></div><div>Cheer,</div><div>Stephen</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On 31 March 2014 22:08, Stephen Politzer-Ahles <span dir="ltr"><<a href="mailto:spa268@nyu.edu" target="_blank">spa268@nyu.edu</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">Hello Aaron,<br><br>This doesn't, answer the rest of your questions, but... In your attached Fieldtrip image, component 1 does look like a likely blink component to me?<br>
<div><div class="gmail_extra"><br clear="all">
<div><div dir="ltr"><div><br><br></div>Stephen Politzer-Ahles<br>New York University, Abu Dhabi<br>Neuroscience of Language Lab<br><a href="http://www.nyu.edu/projects/politzer-ahles/" target="_blank">http://www.nyu.edu/projects/politzer-ahles/</a><br>
</div></div>
<br><br><div class="gmail_quote">On Mon, Mar 31, 2014 at 11:52 PM, <span dir="ltr"><<a href="mailto:fieldtrip-request@science.ru.nl" target="_blank">fieldtrip-request@science.ru.nl</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
Message: 2<br>
Date: Mon, 31 Mar 2014 14:51:51 -0500<br>
From: Aaron Hanford <<a href="mailto:aharown@hotmail.com" target="_blank">aharown@hotmail.com</a>><br>
To: "<a href="mailto:fieldtrip@science.ru.nl" target="_blank">fieldtrip@science.ru.nl</a>" <<a href="mailto:fieldtrip@science.ru.nl" target="_blank">fieldtrip@science.ru.nl</a>><br>
Subject: [FieldTrip] ICA: eeglab and fieldtrip<br>
Message-ID: <BLU184-W8ABD13D8D59439530A857A3630@phx.gbl><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
Hi,I'm resending this with the figures turned into jpgs so it's not oversize...anyway, so I'm somewhat new to both fieldtrip and eeglab (although much more so to fieldtrip). I'm trying to figure out the following:<div>
<div class="h5"><br>
On the exact same dataset, I did the following two things:<br>
1) in eeglab, I just chose Tools -> Run ICA with default settings.<br>
Then, starting over with the original raw data:<br>
2) In fieldtrip I ran the following: data = eeglab2fieldtrip(EEG,'preprocessing','none');cfg = [];cfg.method = 'runica';[comp]=ft_componentanalysis(cfg,data);layout = 'C:\Users\aharown\Desktop\fieldtrip-20140126\template\layout\easycapM17.mat';cfg.component = [1:31];cfg.layout = layout;ft_topoplotIC(cfg,comp);<br>
In both cases I then plotted the 2-D component maps, attached.<br>
So my question is, why are these results so completely different? The fieldtrip results don't look right at all, in that for instance they don't obviously identify a blink component (note that in this dataset, there is only one electrode placed near the right eye, not the left). I did this a handful of times and got the same sort of big differences. Am I doing something wrong or what?<br>
<br>
I actually think the cap file seems incorrect, but I've been assured by my PI that it's correct, so .... is there another likely answer?<br>
Thanks,<br>
Aaron<br></div></div>
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