[FieldTrip] TFR : Common baseline for variable trial length

[Amine JALAL]

Hi Andras,

Thanks for reply and for your help.
I had roughly the same idea. It would be very useful.
Thank you once again.

Best,
Amine

Le jeu. 6 févr. 2020 à 13:35, András Puszta <puszta.andris at gmail.com> a
écrit :

> Hi Amine,
>
> I think you should be aware of 2 things:
> 1. "Trial number" of baseline matches with the trial number of the other
> condition that you compare.
> 2. The selected baseline-period is in the original baseline-distribution's
> CI
>
> What I suggest is to cut randomly as many segments from the baseline as
> the number of trials in the other condition, and as long segments as the
> length of the trials. Next, check if the cutted baseline-segments are
> within the original baseline's CI (for example by bootstrap resampling).
> After that you can perform permutation statistics between baseline and the
> othe condition, or normalize the condition and do permutation test against
> zero.
>
> Hope I helped,
>
> Andras
>
> Amine JALAL <amine.jalal11 at gmail.com> ezt írta (időpont: 2020. febr. 6.,
> Cs, 12:27):
>
>> Dear Fieldtrippers,
>>
>> I'm working on EEG data and I'm trying to perform a time-frequency
>> analysis. Since my data is continuous, I segmented it according to triggers
>> that define the trials (with variable length), so my data is composed by
>> the trials and two long segments at the beginning of the experiment
>> (resting state) and at the end.
>> My aim is to perform a baseline correction to the trials in TFR by taking
>> the baseline from the "resting state" segment.
>> I have been looking for the solution in the tutorials and mailing list,
>> but I didn't get to move forward.
>>
>> I would be very grateful by any help or advice.
>> Thank you in advance.
>>
>> Best,
>> Amine
>>
>> --
>> *   Amine JALAL*
>> MD - Medical imaging & Instrumentation
>> Tél : +33 (0) 6 31 75 23 87
>> _______________________________________________
>> fieldtrip mailing list
>> https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>> https://doi.org/10.1371/journal.pcbi.1002202
>>
>
>
> --
> András Puszta MD, PhD
> Helgeland Hospital / Univerity of Oslo
> Department of Neuropsychology
> Skjervengan 17 8657 Mosjøen, Norway
> _______________________________________________
> fieldtrip mailing list
> https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> https://doi.org/10.1371/journal.pcbi.1002202
>


-- 
*   Amine JALAL*
MD - Medical imaging & Instrumentation
Tél : +33 (0) 6 31 75 23 87
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