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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Dear Andrew,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Thanks for bringing this up. I can try to shed some light on the ICA method used in BESA Research; however, I can not comment on the implementation in FieldTrip. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>The method behind ICA analysis in BESA Research is the extended infomax ICA algorithm (Lee TW et al.: Independent component analysis using an extended infomax algorithm for mixed sub-Gaussian and super-Gaussian sources. Neural Computation 11(2), 1999, 409-433). This algorithm is very well suited to remove cardiac and powerline artifacts. Depending on the data, it may also be used to remove ocular (blink) and electrode artifacts. To assess whether your artifact removal is trustworthy more information about your processing steps are needed. What types of artifacts are you trying to correct? What segments are you using to determine the artifact topographies and what segments are you finally correcting? <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Harald<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>Dr. Harald Bornfleth<o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>Product Manager BESA Research<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=DE style='font-size:9.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>BESA GmbH<o:p></o:p></span></b></p><p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>Freihamer Strasse 18<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>82166 Graefelfing/Germany<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>http://www.besa.de<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>E: Harald.Bornfleth@besa.de<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>T: +49 89 8980 9968<o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='color:#1F497D;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span lang=DE style='color:#1F497D;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>HRB Munich 109956</span><span lang=DE style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:DE'><o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>CEO: Dr. Tobias Scherg, CFO: Theodor Scherg<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D;mso-fareast-language:DE'>Director of Research: Dr. Michael Scherg<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></a></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma",sans-serif'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma",sans-serif'> <a href="mailto:fieldtrip-bounces@science.ru.nl">fieldtrip-bounces@science.ru.nl</a> [<a href="mailto:fieldtrip-bounces@science.ru.nl">mailto:fieldtrip-bounces@science.ru.nl</a>] <b>On Behalf Of </b>Andrew Chang<br><b>Sent:</b> Sonntag, 10. Januar 2016 21:18<br><b>To:</b> <a href="mailto:fieldtrip@science.ru.nl">fieldtrip@science.ru.nl</a><br><b>Subject:</b> [FieldTrip] Comparing ICA methods between toolboxes (BESA vs. Fieldtrip)<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span lang=DE>Dear Fieldtrip users,<o:p></o:p></span></p><div><p class=MsoNormal><span lang=DE><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=DE>I am wondering whether anyone has compared the performances of the ICA methods among M/EEG toolboxes. Especially, how is the performance of ICA in BESA Research 6.0, compared to Fieldtrip?<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=DE>I have an EEG data set which has been processed in BESA, including removing artifact using ICA. I am wondering whether I can trust it, or I should reprocess it in Fieldtrip. Any comments will be appreciated!<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=DE><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=DE>Happy new year!<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=DE><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=DE>Best,<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=DE>Andrew<o:p></o:p></span></p></div><div><div><p class=MsoNormal><span lang=DE><o:p> </o:p></span></p></div><p class=MsoNormal><span lang=DE>-- <o:p></o:p></span></p><div><div><div><div><p class=MsoNormal><span lang=DE style='color:#666666'>Andrew Chang<br>Ph.D. Candidate<br>Auditory Development Lab</span><span lang=DE><o:p></o:p></span></p><div><p class=MsoNormal><span lang=DE style='color:#666666'>Department of Psychology, Neuroscience & Behaviour<br>McMaster University</span><span lang=DE><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=DE><a href="http://changa5.wordpress.com/" target="_blank">http://changa5.wordpress.com/</a><o:p></o:p></span></p></div></div></div></div></div></div></div></div></body></html>