[Eeglablist] Codes for cluster correction are needed

[Dr Cyril, Pernet]

Hi Olivia

clustering requires some continuity over space and/or time - here you 
have a 30 (Subjects) × 4 (Conditions in my experiment) × 66 (Channels) 
matrix of peak values so could cluster over space but I would really not 
recommend doing that as these a 'peaks' so really different measurements 
at each channels - in your case I'd test whatever differences you are 
interested in and apply an FDR correction.

more info from a good old EEGLAB lecture 
https://urldefense.com/v3/__https://figshare.com/articles/presentation/Statistical_analysis_of_EEG_data_Hierarchical_modelling_and_multiple_comparisons_correction/4233977__;!!Mih3wA!AkQADhZELybBWOOEI0Q6kE6QoBK_5RqWQn_PcZSS_6po295-jKsqPfz8_yuiHuej776IbQ-Y87juhnWCkXMlaA$  
slides 2 and 3 gives you an idea why I'd not recommend your approach 
above and slides 24+ explains multiple comparison corrections and among 
those procedure, clustering.

reference article 
https://urldefense.com/v3/__https://www.sciencedirect.com/science/article/pii/S0165027014002878__;!!Mih3wA!AkQADhZELybBWOOEI0Q6kE6QoBK_5RqWQn_PcZSS_6po295-jKsqPfz8_yuiHuej776IbQ-Y87juhnXh7hVn_Q$ 

cyril


> Dear EEGLAB geniuses,
>
> Do you know whether there are codes for performing cluster corrections?
>
> After I finished the preprocessing analysis in EEGLAB, I picked out peak values of N170 from average waveforms through custom Matlab codes. And a 30 (Subjects) × 4 (Conditions in my experiment) × 66 (Channels) matrix of peak values was generated. Afterwards, I conducted repeated measure ANOVA and got statistical values of each channel.
>
> Now I need to perform multiple comparison corrections (cluster correction) for the comparison of peak value difference among the four conditions. Are there codes or more effortless ways that can help me?
>
> Looking forward to your reply!
>
> Cheers!
>
> Best regards,
>
> Olivia
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-- 
Dr Cyril Pernet, PhD, OHBM fellow, SSI fellow
Neurobiology Research Unit,
Building 8057, Blegdamsvej 9
Copenhagen University Hospital, Rigshospitalet
DK-2100 Copenhagen, Denmark

wamcyril at gmail.com
https://urldefense.com/v3/__https://cpernet.github.io/__;!!Mih3wA!AkQADhZELybBWOOEI0Q6kE6QoBK_5RqWQn_PcZSS_6po295-jKsqPfz8_yuiHuej776IbQ-Y87juhnUuqqCDhg$ 
https://urldefense.com/v3/__https://orcid.org/0000-0003-4010-4632__;!!Mih3wA!AkQADhZELybBWOOEI0Q6kE6QoBK_5RqWQn_PcZSS_6po295-jKsqPfz8_yuiHuej776IbQ-Y87juhnXOCKvp0Q$