<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Times New Roman; font-size: 12pt; color: #000000'><font class="Apple-style-span" size="3">Hi Hanneke,</font><div style="color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-size: 12pt; "><br></div><div style="color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-size: 12pt; ">If my understanding is correct, you cannot use common filters over all sessions, exactly because of the reason you mention (different spatial relation between sensors and the head/brain). Using common filters within a session is ok of course (to look at effect of condition on a source's activity).</div><div><font class="Apple-style-span" size="3">What you could do as an alternative is compute virtual sensor time courses for the source-of-interest, separately for both sessions, and </font>subsequently<font class="Apple-style-span" size="3"> append these (source-level) data afterwards (and then your contrasts/statistics).</font></div><div><br></div><div><font class="Apple-style-span" size="3"></font>Hope this helps.</div><div><br></div><div>Stan</div><div><br></div><div><p class="MsoNormal"><span class="apple-style-span"><span style="font-size:11.5pt;
font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black">-- </span></span><span style="font-size:10.0pt;font-family:
"Tahoma","sans-serif";mso-fareast-font-family:"Times New Roman";color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:11.5pt;
font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black">Stan van Pelt, PhD</span></span><span style="font-size:10.0pt;
font-family:"Tahoma","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";
mso-fareast-font-family:"Times New Roman";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:11.5pt;
font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black">Ernst Strüngmann Institute (ESI)</span></span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-font-family:
"Times New Roman";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:11.5pt;
font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black">for Neuroscience in Cooperation with Max Planck Society </span></span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-font-family:
"Times New Roman";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:11.5pt;
font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black">Deutschordenstr. 46</span></span><span style="font-size:10.0pt;
font-family:"Tahoma","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:11.5pt;
font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black">60528 Frankfurt, Germany</span></span><span style="font-size:10.0pt;
font-family:"Tahoma","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:11.5pt;
font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black">Website: <a href="http://www.esi-frankfurt.de" target="_blank">www.esi-frankfurt.de</a></span></span><span style="font-size:
10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:11.5pt;
font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black">E-mail: <a href="mailto:stan.vanpelt@esi-frankfurt.de" target="_blank" title="Ctrl+Klik om de koppeling te openen">stan.vanpelt@esi-frankfurt.de</a></span></span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-font-family:
"Times New Roman";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:11.5pt;
font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black">Tel:
+49 (0)69 96769 519</span></span><span style="font-size:10.0pt;font-family:
"Tahoma","sans-serif";mso-fareast-font-family:"Times New Roman";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:11.5pt;
font-family:"Calibri","sans-serif";mso-fareast-font-family:"Times New Roman";
color:black">Fax: +49
(0)69 96769 555</span></span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";
mso-fareast-font-family:"Times New Roman";color:black"><o:p></o:p></span></p><br><hr id="zwchr" style="color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-size: 12pt; "><blockquote style="border-left-width: 2px; border-left-style: solid; border-left-color: rgb(16, 16, 255); margin-left: 5px; padding-left: 5px; color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-size: 12pt; "><b>Van: </b>"Hanneke vanDijk" <Hanneke.vanDijk@med.uni-duesseldorf.de><br><b>Aan: </b>fieldtrip@donders.ru.nl<br><b>Verzonden: </b>Maandag 25 juni 2012 10:44:59<br><b>Onderwerp: </b>[FieldTrip] source analysis: common filter<br><br><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.E-MailFormatvorlage17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal">Dear all,</p><p class="MsoNormal"> </p><p class="MsoNormal">Currently I am analyzing data of an experiment in which subjects perform two conditions in two sessions. They have been out of the MEG system between the sessions.</p><p class="MsoNormal"> </p><p class="MsoNormal">For sourceanalysis I am using mni-normalized headmodels and grids. This because in the two sessions the subjects are probably seated slightly differently in the MEG system. (Thus I have separate headmodels and grids for the two sessions).</p><p class="MsoNormal"> </p><p class="MsoNormal">Currently I am using a common filter for analyzing the two conditions <u>within </u>a session. I am wondering however if it would be (even) possible and if yes, more, or less correct to use a common filter over all conditions/sessions.</p><p class="MsoNormal"> </p><p class="MsoNormal">Best Regards,</p><p class="MsoNormal"> </p><p class="MsoNormal">Hanneke</p><p class="MsoNormal"> </p><p class="MsoNormal"><span style="font-size:9.0pt">__________________________________________</span></p><p class="MsoNormal"><span style="font-size:9.0pt"> </span></p><p class="MsoNormal"><span style="font-size:9.0pt">Hanneke van Dijk, PhD</span></p><p class="MsoNormal"><span lang="DE" style="font-size:9.0pt"><a href="http://www.uniklinik-duesseldorf.de/deutsch/unternehmen/institute/KlinNeurowiss/Team/HannekevanDijk/page.html" target="_blank"><span lang="EN-US" style="color:blue">http://www.uniklinik-duesseldorf.de/deutsch/unternehmen/institute/KlinNeurowiss/Team/HannekevanDijk/page.html</span></a></span><span style="font-size:9.0pt"></span></p><p class="MsoNormal"><span style="font-size:9.0pt">Institute for Clinical Neuroscience,</span></p><p class="MsoNormal"><span style="font-size:9.0pt">Heinrich Heine Universit</span><span lang="DE" style="font-size:9.0pt">ä</span><span style="font-size:9.0pt">t D</span><span lang="DE" style="font-size:9.0pt">ü</span><span style="font-size:9.0pt">sseldorf, Germany</span></p><p class="MsoNormal"><span style="font-size:9.0pt"><a href="mailto:Hanneke.vanDijk@med.uni-duesseldorf.de" target="_blank">Hanneke.vanDijk@med.uni-duesseldorf.de</a></span></p><p class="MsoNormal"><span style="font-size:9.0pt">Tel. +49 (0) 211 81 13074 </span></p><p class="MsoNormal"><span style="font-size:9.0pt">__________________________________________ </span></p><p class="MsoNormal"> </p></div><br>_______________________________________________<br>fieldtrip mailing list<br>fieldtrip@donders.ru.nl<br>http://mailman.science.ru.nl/mailman/listinfo/fieldtrip</blockquote><br><br><br><font class="Apple-style-span" size="3">-- </font><br><div style="color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-size: 12pt; "><span name="x"></span>Stan van Pelt<br><br>Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen<br>Kapittelweg 29, 6525 EN Nijmegen, Netherlands<br>E-mail: stan.vanpelt@donders.ru.nl<br>Website: www.ru.nl/donders/<br>Phone: (+31) (0)24 36 10981<br>Fax: (+31) (0)24 36 10989<span name="x"></span><br></div></div></div></body></html>