<div dir="ltr">Dear Zita,<div><br></div><div>The short answer is yes, as you guessed already. Ideally, the confound is measured independently from the dependent measure, e.g. eye tracker activity to filter against eye movement related confounds in neural activity. But in the past we've also successfully regressed out eye movement related contributions as captured with EOG from frontal (source-reconstructed) neural activity, despite that both signals may have been partially correlated due to field spread. See 'General assessments of neurophysiologic data' & Fig S3 of this pdf:</div><div><a href="http://www.pnas.org/content/suppl/2013/08/16/1303170110.DCSupplemental/pnas.201303170SI.pdf">http://www.pnas.org/content/suppl/2013/08/16/1303170110.DCSupplemental/pnas.201303170SI.pdf</a><br></div><div>The same principle that underlies head movement compensation thus also holds for other potential confounds, including the ones mentioned by you.</div><div><br></div><div>Best,</div><div>Arjen</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">2017-01-30 5:27 GMT-08:00 Zita Eva Patai <span dir="ltr"><<a href="mailto:e.patai@ucl.ac.uk" target="_blank">e.patai@ucl.ac.uk</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><span style="font-size:12.8px">Dear FT-ers,</span><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">I have an obvious question, but would still appreciate input from those more wise than myself:</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Can I put any sort of confound in to regress out of my data? For example things relating to</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">-eye-movements (ICA done but I still have obvious condition differences)</div><div style="font-size:12.8px">-experimentally uncontrolled stimulus changes</div><div style="font-size:12.8px">-or any other environmental effects i'd like to control for</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Thank you</div><span class="HOEnZb"><font color="#888888"><div style="font-size:12.8px">zita</div><br clear="all"><div><br></div>-- <br><div class="m_2983950131729379638gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div style="font-size:12.8px">Eva Zita Patai, DPhil</div><div style="font-size:12.8px">Postdoctoral Researcher</div><div style="font-size:12.8px">Institute of <img style="color:rgb(0,0,0);font-size:1.231em;font-weight:bold;font-family:arial,helvetica,clean,sans-serif">Behavioural Neuroscience<br></div><div style="font-size:12.8px">UCL</div></div></div>
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