Thanks Eugene.<br><br>I&#39;ll maybe  have to go a little bit deeper to explain my question.<br><br>Let&#39;s supose we have  2 groups  scanned under two different conditions.<br>Now, what&#39;s the <span class="il">paired</span> <span class="il">t</span> <span class="il">test</span> criteria if we have the same amount of activated voxels in the same cortical area?<br>
Are these areas substracted and only voxels with higher z-scores values survive? <br><span class="il">Paired</span> <span class="il">t</span> <span class="il">test</span> does substractions between two  groups mean activations?  <br>
<br>Thanks in advance <br>Best regards.<br><div class="gmail_quote"><br>2011/1/28 Eugene Duff <span dir="ltr">&lt;<a href="mailto:[log in to unmask]"><a href="/cgi-bin/wa-jisc.exe?LOGON=A3%3Dind1101%26L%3DFSL%26E%3Dquoted-printable%26P%3D2896752%26B%3D--0016e6de0380645b70049aeb0778%26T%3Dtext%252Fhtml%3B%2520charset%3DISO-8859-1%26pending%3D" target="_parent" >[log in to unmask]</a></a>&gt;</span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi Mathias,<div><br></div><div>Start with the FEAT webpages <a href="http://www.fmrib.ox.ac.uk/fsl/feat5/detail.html" target="_blank">http://www.fmrib.ox.ac.uk/fsl/feat5/detail.html</a><br><br></div><div>The type of model you use (paired, ANOVA) is independent of how you perform the thresholding of the statistic maps (cluster, voxel etc.)</div>


<div><br></div><div>Eugene <br><font color="#888888">--</font><div><div></div><div class="h5"><br>
<br><br><div class="gmail_quote">On 28 January 2011 14:52, Mathias Warnke <span dir="ltr">&lt;<a href="mailto:[log in to unmask]" target="_blank"><a href="/cgi-bin/wa-jisc.exe?LOGON=A3%3Dind1101%26L%3DFSL%26E%3Dquoted-printable%26P%3D2896752%26B%3D--0016e6de0380645b70049aeb0778%26T%3Dtext%252Fhtml%3B%2520charset%3DISO-8859-1%26pending%3D" target="_parent" >[log in to unmask]</a></a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">


Hi fsl experts, <span dir="ltr">i&#39;m new at fsl and i&#39;ve been trying to do some group analysis comparisons</span><br><br>Do anyone know if paired t tests comparisons are based on cluster or voxel analysis?<br>
Any website for specific details?<br><br>Thanks in advance
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</blockquote></div><br><br clear="all"><br>-- <br>Ignacio Letelier Aguirre<br>Ingeniero Civíl Biomédico<br>Clinica Santa María.<br>Teléfono: 97139955<br><br>