Realigning trials

Robert Oostenveld r.oostenveld at FCDONDERS.RU.NL
Tue Jun 14 11:53:42 CEST 2005

Dear Vladimir,

You might want to look into
    Wang K, Begleiter H, Porjesz B.
    Warp-averaging event-related potentials.
    Clin Neurophysiol. 2001 Oct;112(10):1917-24.
and references therein.

best regards,

On 12 Jun 2005, at 18:11, Litvak Vladimir wrote:

> Dear all,
> We have a somatosensory paradigm where we cannot measure exactly
> when the subject starts feeling the stimulus. We do have triggers
> but there may be varying delays of tens to hundreds ms.
> Nevertheless, it's possible to get a kind of SEP. But I suspect it
> would look better if I found a way to realign the trials. I heard
> about Woody filter but maybe it would be better to try to align all
> the trials to the first or to use some kind of template.
> I have some ideas about how this can be implemented but if anyone
> already has a working Matlab code for something like this
> (including Woody filter) it'd save me a lot of time and efforts.
> Suggestions and ideas will also be appreciated.
> Thanks in advance,
> Vladimir Litvak

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