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<p class="MsoNormal">Dear Fieldtrippers,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m currently working on an MEG dataset and have so far done automatic rejection of bad channels using Maxfilter and then done ICA-based artefact reduction (eyeblinks and heartbeat) in MNE Python. I now have my data in Fieldtrip trial structures.
What is left is to remove trials that are outliers/noisy because the subject moved/coughed/etc. I have tried to use ft_visinspect with variance as metric, but the issue I have is that the variance is displayed in actual units (e.g. 1e10^23) rather than in
terms of standard deviations. This is problematic, as my trial rejection will be based on my subjective decisions that some trials look like outliers and not others. What I would like instead is to just do something like “discard trials where the amplitude
is more than X standard deviations above or below the mean”, which is reproducible. Is this way of rejecting trials implemented in FT? I have seen the tutorial on automatic artefact rejection, but it looks more like something that would be useful for removing
e.g. eyeblinks.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best wishes,<o:p></o:p></p>
<p class="MsoNormal">Heidi<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN" style="font-size:9.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:9.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB">----------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:9.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:9.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB">Heidi Solberg Økland<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:9.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB">PhD candidate, Language group<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:9.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB">Tel: 01223 273721<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:12.0pt"><span style="font-size:9.0pt;font-family:"Times New Roman","serif";color:black;mso-fareast-language:EN-GB">MRC Cognition & Brain Sciences Unit</span><span style="font-size:9.0pt;font-family:"Times New Roman","serif";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Times New Roman","serif";color:black;mso-fareast-language:EN-GB">University of Cambridge<br>
15 Chaucer Road<br>
Cambridge<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Times New Roman","serif";color:black;mso-fareast-language:EN-GB">CB2 7EF<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Times New Roman","serif";color:black;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB">Web:
<a href="http://www.mrc-cbu.cam.ac.uk/">http://www.mrc-cbu.cam.ac.uk</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-GB">Social media:<o:p></o:p></span></p>
<p class="MsoNormal"><a href="https://en-gb.facebook.com/MRCCBU/"><span style="color:#1F497D;mso-fareast-language:EN-GB;text-decoration:none"><img border="0" width="28" height="28" id="Picture_x0020_4" src="cid:image001.png@01D39381.87D84C00" alt="facebook-flat-logo-01"></span></a><span style="color:#1F497D;mso-fareast-language:EN-GB">
</span><a href="https://mobile.twitter.com/mrccbu?lang=en"><span style="color:#1F497D;mso-fareast-language:EN-GB;text-decoration:none"><img border="0" width="28" height="28" id="Picture_x0020_3" src="cid:image002.png@01D39381.87D84C00" alt="twiiter-flat-logo-02"></span></a><span style="color:#1F497D;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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