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<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Dear Son,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">I had a similar issue and had talked to our mathematicians/statisticians. They recommended to use Bonferroni…although that is not the answer you were looking for and other people might have better
ideas, I though the info might still be valuable.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D">Christine<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:DE-AT">Von:</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:DE-AT"> fieldtrip-bounces@science.ru.nl
[mailto:fieldtrip-bounces@science.ru.nl] <b>Im Auftrag von </b>Ta Dinh, Son<br>
<b>Gesendet:</b> Dienstag, 03. April 2018 11:06<br>
<b>An:</b> fieldtrip@science.ru.nl<br>
<b>Betreff:</b> [FieldTrip] FDR correction of multiple cluster-based permutation tests<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Dear FieldTrip list,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I would like to correct the results of multiple cluster-based permutation tests using FDR. This is obviously trivial when I have a single cluster for every single test. However, this does not happen in general. My biggest
problem is when I have no cluster at all because I also don’t have a p value then.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is there a reasonable way to extract a p value from the cluster-statistics when no cluster can be found? I have thought about just using p = 1 in these cases, but that seems very arbitrary and intuitively wrong.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Can anybody think of a different way of FDR-correcting multiple cluster-based permutation tests?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Obviously, I could also just use Bonferroni to adjust the alpha level, but that is simply too restrictive in general. But maybe someone knows a different way of correcting for multiple comparisons for this case that is
neither Bonferroni nor FDR?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Any help and/or references would be greatly appreciated!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Son<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:7.5pt;font-family:"Times New Roman","serif";color:#888888;mso-fareast-language:DE">Son Ta Dinh, M.Sc.</span><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#888888;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:7.5pt;font-family:"Times New Roman","serif";color:#888888;mso-fareast-language:DE">PhD student in Human Pain Research</span><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#888888;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:7.5pt;font-family:"Times New Roman","serif";color:#888888;mso-fareast-language:DE">Klinikum rechts der Isar</span><span lang="DE" style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#888888;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE" style="font-size:7.5pt;font-family:"Times New Roman","serif";color:#888888;mso-fareast-language:DE">Technische Universität München<br>
Munich, Germany<br>
Phone: <a href="tel:%2B49%2089%204140%207664" target="_blank"><span style="color:blue">+49 89 4140 7664</span></a><br>
<a href="http://www.painlabmunich.de/" target="_blank"><span style="color:blue">http://www.painlabmunich.de/</span></a></span><span lang="DE" style="font-size:12.0pt;font-family:"Times New Roman","serif";color:#888888;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="DE"><o:p> </o:p></span></p>
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