[Eeglablist] ERSP and ERP analyse using MPT clustering method

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Fri May 15 18:40:34 PDT 2015

Dear Mohammed,

> 1. Should I select the same ICAs for ERP and ERSP?
Follow this instruction and clean your ICs using STUDY
And you can use ERP or ERSP as you want in MPT. I mean you want to use the
same set of ICs from this cleaning for anything.


On Mon, May 11, 2015 at 2:46 AM, Mohammed Jarjees <
m.jarjees.1 at research.gla.ac.uk> wrote:

> Dears,
> I want to cluster my 61 electrodes EEG data for three groups of people
> each group has 10 subjects and each subjects has three conditions.
> I would like to analyse ERSP and ERP and to use MPT clustering method. MPT
> suggest to use one feature at the time, so I will create separate studies
> for ERSP and ERP. I would like to be able to compare clustering of ERSP and
> of ERP as these two variables might not necessarily have the same clusters.
> My questions are:
> 1. Should I select the same ICAs for ERP and ERSP?  Though this might
> sound a common sense, by visual inspection of ICAs I've noticed that some
> ICs have very strong ERP while not much is going on in ERSP and vice-versa,
> some have very little ERP with strong ERSP. Therefore taking common
> components for both might blur  results for both ERP and ERSP.
> 2. In case I should not use the same components, may I produce two ICs
> sets, one filtered at 0.1Hz for ERP and the other filtered with 1Hz for
> ERSP. That is because filtering with 1Hz for ERSP really helps removing a
> baseline drift and I get clearer ICs then when filtering with 0.1 Hz (which
> is necessary should I analyse ERP)?
> Would I still be able to compare spatial locations of ERP and ERSP
> clusters?
> Thank you very much for your help.
> Best regards,
> Mohammed
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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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