<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yiv1676475773"><div id="yui_3_16_0_1_1426669009073_12298" style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div style="" class="yiv1676475773" dir="ltr" id="yiv1676475773yui_3_16_0_1_1426669009073_3563">Dear All,</div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_3595" dir="ltr"><br style="" class="yiv1676475773"></div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_3596" dir="ltr">I would like to get some feedback from the community about a statistical analysis problem I need to tackle with my study.</div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_3657" dir="ltr">I want to apply the cluster-based permutation tests on time-frequency data considering two conditions (correct vs error).</div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_3732" dir="ltr">Unfortunately, these two conditions have different sizes (correct >> error).</div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_3812" dir="ltr">Right
now, I am only considering subjects having a ratio "error/correct"
bigger than 1/5, yet this is only an arbitrary threshold I set.</div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_3860" dir="ltr">The question is the following:</div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_3861" dir="ltr">is
there a formal way to identify a threshold by which two conditions can
be realiably compared with the cluster-based permutation tests?</div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_3972" dir="ltr">If the cluster-based approach is not suitable in this scenario, is there any other approach you would suggest?</div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_4109" dir="ltr">I shall perhaps point out that I am working on EEG data recorded with a 32 channel system (impedance levels < 10 k<span style="" class="yiv1676475773">Ω).</span></div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_4094" dir="ltr"><br style="" class="yiv1676475773"></div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_4075" dir="ltr">Looking forward to hear your feedback :)</div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_4084" dir="ltr"><br style="" class="yiv1676475773"></div><div style="" class="yiv1676475773" id="yiv1676475773yui_3_16_0_1_1426669009073_4076" dir="ltr">Kind Regards,</div>Martina Rossi<div style="" class="yiv1676475773" dir="ltr" id="yiv1676475773yui_3_16_0_1_1426669009073_10694"><br style="" class="yiv1676475773"></div></div></div></div></body></html>