[Eeglablist] Average the F and p-values

[cyril pernet]

Hi David

in the LIMO EEG toolbox 
(https://gforge.dcn.ed.ac.uk/gf/project/limo_eeg/) we tend to plot an 
imagesc like of the F tests (ie all electrodes and time frames) and then 
the relevant electrode (for instance the one showing earliest effect or 
max effect) - on the plot we have confidence intervals and nice little 
stars to show where the effect is (given the multiple comparison 
correction applied)

you can see the plots in the manual to give you an idea

Cyril



ForwardedMessage.eml

Subject:
[Eeglablist] Average the F and p-values?
From:
david grahms <david.grahms at gmail.com>
Date:
11/02/2013 11:12

To:
eeglablist at sccn.ucsd.edu


Hello list,

I have a question about reporting statistics derived from EEGLAB, or 
rather how to reduce and report relevant statistics. One of the many 
strengths of EEGLAB is the possibility to perform statistical testing 
over all your electrodes and samples when performing a simple ERP 
experiment. I do, however have trouble understanding what to do with 
huge amount of F and p-values once I have performed the testing.

One problem is deciding which electrodes to include when reporting the 
statistical significance another is, if I choose one (or a cluster of 
relevant electrodes), do I still have to average relevant time period of 
that electrode and test it again, or can I average the F and p-values 
within that period for that specific electrode (or cluster)?


Best regards,
David


-- 
Dr Cyril Pernet,

Academic Fellow
Brain Research Imaging Center
http://www.bric.ed.ac.uk/
Division of Clinical Neurosciences
University of Edinburgh
Western General Hospital
Crewe Road
Edinburgh
EH4 2XU
Scotland, UK

cyril.pernet at ed.ac.uk
tel: +44(0)1315373661
http://www.sbirc.ed.ac.uk/LCL/
http://www.sbirc.ed.ac.uk/cyril

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