[FieldTrip] baseline_normalization

[Ivan Chakalov]

Thanks a lot!

On 12 November 2012 11:24, Eelke Spaak <eelke.spaak at donders.ru.nl> wrote:

> Dear Ivan,
>
> Yes, you are correct. I think "relative change of spectral power"
> covers what the formula means quite well.
>
> Best,
> Eelke
>
> On 12 November 2012 11:16, Ivan Chakalov <chakalov.ivan at googlemail.com>
> wrote:
> > Dear Fieldtrippers,
> >
> > I have question regarding the baseline normalization using Time Frequency
> > Analyses on a sensor space-level. I have used “Hanning tapper “for
> analyzing
> > MEG data with “relchange” (relative change) baseline-normalization. So
> far I
> > have no idea how to report the obtained results in terms of units or
> > dimensions?  Should it be called “relative change of the spectral
> power”? As
> > I understood, if Pa is the spectral power of the post-rigger time-period
> and
> > Pb is the spectral power of the pre-trigger period, the “relchange”
> value is
> > calculated as: Pa-Pb/Pb
> >
> > Am I correct?
> >
> >
> >
> > Thank you in advanced!
> >
> > Ivan Chakalov
> >
> >
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