[Eeglablist] ERSP singletrial in STUDY

Alice Bollini alice.bollini at univr.it
Thu Oct 8 02:42:45 PDT 2015

Sorry but I'm new user, what I should post on bugzilla the same pictures? or the study file? 
I made some progress. I try to use the single-trial normalization for ERSP proposed by Grandchamp and Delemore so when I did again the precomputation of the measure on erps parameter where I used 'trialbase' 'full'.
Now the colorbar, when I used the single-trials statistic, is normal even it's different from that without statistics (see pic 1 or 2). However the erps figure is quite weird compared with pic 3(that is without any statistics).
pic1  https://www.dropbox.com/s/gnzoxua9fa9ofhv/withstatisticsEEGlab.jpg?dl=0
pic2  https://www.dropbox.com/s/d4w0idbg0gusq3b/withstatisticsFieldtrip.jpg?dl=0
pic3  https://www.dropbox.com/s/85f4jgb6w9hrqvf/without.jpg?dl=0

Thank you very much for the patience

----- Messaggio originale -----
Da: "Makoto Miyakoshi" <mmiyakoshi at ucsd.edu>
A: "Alice Bollini" <alice.bollini at univr.it>
Cc: "EEGLAB List" <eeglablist at sccn.ucsd.edu>
Inviato: Mercoledì, 7 ottobre 2015 23:49:17
Oggetto: Re: [Eeglablist] ERSP singletrial in STUDY

Dear Alice, 

I saw the pictures. I agree with you. There must be a problem in code. 
Please file the problem to EEGLAB bugzilla. 

I appreciate your patience and cooperation. 


On Tue, Oct 6, 2015 at 6:12 AM, Alice Bollini < alice.bollini at univr.it > wrote: 

Hi Everyone, 
I have just done the single_trials analysis in a STUDY with one subject to get ERSP difference between two conditions, I used both Fieldrip statistics and EEGLAB statistics. I got these results : 
when I didn't make the statistic I got a figure with normal DB values(see colorbar) https://www.dropbox.com/s/czfsrzzwvmdnrof/WithoutAnalysis.jpg?dl=0 
but with both single_trial analyses I got very high DB results, https://www.dropbox.com/s/cvh9feca0qoxtkj/WithSingleTrialstAnalysis.jpg?dl=0 
that is quite unlikely. This happens both for channel and component measures and with different subjects. I have also noticed that with normal ERPs when I computed the single-trials analyses I obtained a decrease in microVolt compared with ERPs without analyses. 
Any suggestions would be welcome! 

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Makoto Miyakoshi 
Swartz Center for Computational Neuroscience 
Institute for Neural Computation, University of California San Diego 

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