<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr">Dear fieldtrip community,<div><br></div><div>I have a question on cluster based permutation tests where one condition is compared with multiple other conditions. My experiment is a MMN multi-deviant paradigm where I have 4 deviants and one standard. I want to compare each deviant with the standard using the cluster stats to check the presence of MMN. Do I have to apply any correction as the same standard condition is compared multiple times? My script is below:</div><div><br></div><div><p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg = [];</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.channel = {<span style="color:rgb(160,32,240)">'EEG'</span>};</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.spmversion = <span style="color:rgb(160,32,240)">'spm12'</span>;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.latency = [-100 600];</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.method = <span style="color:rgb(160,32,240)">'montecarlo'</span>;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.statistic = <span style="color:rgb(160,32,240)">'depsamplesT'</span>;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.correctm = <span style="color:rgb(160,32,240)">'cluster'</span>;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.clusteralpha = 0.05;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.clusterstatistic = <span style="color:rgb(160,32,240)">'maxsum'</span>;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.minnbchan = 2;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.tail = 0;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.clustertail = 0;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.alpha = 0.025;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.numrandomization = 5000;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg_neighb.layout = lay;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg_neighb.method = <span style="color:rgb(160,32,240)">'triangulation'</span>;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.neighbours = ft_prepare_neighbours(cfg_neighb);</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica;color:rgb(60,118,61)">%cfg.neighbours = neighbours;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.uvar = 1;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.ivar = 2;</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">cfg.design = [1:19 1:19; ones(1,19) 2*ones(1,19)];</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">Stat_MMN1 = ft_timelockstatistics(cfg, All_Dev1{:},All_Std{:});</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">Stat_MMN2 = ft_timelockstatistics(cfg, All_Dev2{:},All_Std{:});</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">Stat_MMN3 = ft_timelockstatistics(cfg, All_Dev3{:},All_Std{:});</p>
<p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica">Stat_MMN4 = ft_timelockstatistics(cfg, All_Dev4{:},All_Std{:});</p></div><div><br></div><div>Kind regards,</div><div>Arti</div><div><br></div><div><br></div><div><p style="margin:0px;font-stretch:normal;font-size:10px;line-height:normal;font-family:Helvetica"><br></p></div></div></div></div></div>