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<DIV align=left dir=ltr> </DIV>
<DIV align=left dir=ltr><FONT color=#0000ff face=Arial size=2><SPAN
class=807063708-27022006>Dear Vladimir,</SPAN></FONT></DIV>
<DIV align=left dir=ltr><FONT color=#0000ff face=Arial size=2><SPAN
class=807063708-27022006></SPAN></FONT> </DIV>
<DIV align=left dir=ltr><FONT color=#0000ff face=Arial size=2><SPAN
class=807063708-27022006>what aspect of the two data pieces are you comparing?
Power? Coherence? Amplitude? At the sensor or at the source
level?</SPAN></FONT></DIV>
<DIV align=left dir=ltr><FONT color=#0000ff face=Arial size=2><SPAN
class=807063708-27022006></SPAN></FONT> </DIV>
<DIV align=left dir=ltr><FONT color=#0000ff face=Arial size=2><SPAN
class=807063708-27022006>Best, Pascal</SPAN></FONT></DIV>
<DIV align=left dir=ltr><FONT color=#0000ff face=Arial size=2><SPAN
class=807063708-27022006></SPAN></FONT> </DIV>
<DIV align=left dir=ltr><FONT color=#0000ff face=Arial size=2><SPAN
class=807063708-27022006></SPAN></FONT> </DIV>
<DIV align=left dir=ltr><FONT color=#0000ff face=Arial size=2><SPAN
class=807063708-27022006><!-- Converted from text/plain format -->
<P><FONT size=2>Pascal Fries<BR>Principal Investigator<BR>Neuronal Coherence
Group<BR>F. C. Donders Centre for Cognitive Neuroimaging<BR>Radboud University
Nijmegen<BR><BR>Kapittelweg 29<BR>6525 EN Nijmegen<BR>The
Netherlands<BR><BR>Phone: (+31) (0)24 36 10657<BR>Fax: (+31) (0)24
36 10989<BR>e-mail: pascal.fries@fcdonders.ru.nl<BR>website:
www.ru.nl/fcdonders/</FONT> </P></SPAN></FONT></DIV>
<DIV align=left dir=ltr> </DIV><BR>
<BLOCKQUOTE
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<DIV align=left class=OutlookMessageHeader dir=ltr lang=en-us>
<HR tabIndex=-1>
</DIV><FONT face=Tahoma size=2><B>From:</B> FieldTrip discussion list
[mailto:FIELDTRIP@NIC.SURFNET.NL] <B>On Behalf Of </B>Vladimir
Litvak<BR><B>Sent:</B> Monday, February 27, 2006 9:24 AM<BR><B>To:</B>
FIELDTRIP@NIC.SURFNET.NL<BR><B>Subject:</B> [FIELDTRIP] Activation vs.
baseline<BR></FONT><BR>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Dear Eric and
all,</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"> </SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">I’m playing with ‘Activation vs.
baseline’ option in clusterrandanalysis. The problem is that my baseline is
about 100ms while the activation period is 300 ms. I cannot extend the
baseline since the raw data I have is already segmented. What is the right
thing to do in this situation? Should I divide the activation period into 3
segments and test them separately? Or maybe replicate the baseline 3 times,
concatenate and use this as baseline for the whole period? </SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"> </SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Thanks,</SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"> </SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Vladimir</SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>