[Eeglablist] Epoch multi-word ERP

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Wed Apr 15 20:10:23 PDT 2015

Dear Isaiah,

I saw Martha Kutas few weeks ago in the campus. Write her email and ask it.


On Mon, Apr 13, 2015 at 12:58 PM, Isaiah Innis <isainnis at umail.iu.edu>

> Hello eeglablist:
> We are planning a language ERP study exploring object versus subject
> relative clauses. The plan is to examine both word-by-word and whole
> sentence length processing, following the example set in this paper: (
> http://kutaslab.ucsd.edu/people/kutas/pdfs/1995.JCN.376.pdf). Stimuli are
> sentences presented one word at a time, followed by a comprehension probe
> sentence (subjects have up to 6000 msec to respond).
> The problem is, that paper provides only a gross description of how they
> epoched their EEG data. This has left us with a few questions:
> 1. Is there a way to extract epochs from sentences with different lengths?
> Some trials have 12 word sentences, others 13 words etc. . .
> 2. Since the subject may take up to 6000msec in their response, is it
> possible to have variable epoch endpoints based on when they responded?
> In general, our questions are about how to deal with variance in the
> stimulus/trial length when epoching. The above paper apparently handled
>  such differences in test stimuli length, but does not describe how they
> did so.
> Any insight or suggestions would be appreciated.
> Thank you for your time,
> --
> Isaiah Innis
> Indiana University '13
> EEG Technician, IUB IRF
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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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