[Eeglablist] ERSP singletrial in STUDY

[Makoto Miyakoshi]

Dear Alice,

> Sorry but I'm new user, what I should post on bugzilla the same pictures?
or the study file?

Picture would be fine. I think your question/report is valid.

> 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).

In Fig 1 and 2 your ERSP values are all positive. I wonder if baseline
correction is properly done. In Fig 3 you do have positive and negative,
and seeming mean 0 during the negative latency.

Makoto



On Thu, Oct 8, 2015 at 2:42 AM, Alice Bollini <alice.bollini at univr.it>
wrote:

> 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
> Alice
>
>
> ----- 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.
> https://sccn.ucsd.edu/bugzilla/enter_bug.cgi
>
> I appreciate your patience and cooperation.
>
>
> Makoto
>
>
> 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!
>
> Thanks
> Alice
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>
>
> --
>
>
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
>



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