[Eeglablist] How many epochs to average for the ERP

[Makoto Miyakoshi]

Dear Imali,

> What is the usual practise used for the number of epochs to average to
get the ERP?

I would not discard a dataset just because it has 20 trials (after bad
epoch rejection) as long as it looks ok. So I would say minimum is 20-30
for your P300 task.

> If anyone can direct me to some papers or references on experimental
designs for ERP analysis that will be greatly appreciated.

T.W. PICTON, S. BENTIN, P. BERG, E. DONCHIN, S.A. HILLYARD, R. JOHNSON, JR.,
G.A. MILLER, W. RITTER, D.S. RUCHKIN, M.D. RUGG, M.J. TAYLOR. (2000).
Guidelines for using human event-related potentials to study cognition:
Recording tandards
and publication criteria. Psychophysiology. 37:127–152.

Makoto



2012/8/22 IMALI THANUJA HETTIARACHCHI <ith at deakin.edu.au>

>  Dear EEGLAB users,****
>
> ** **
>
> I am planning to do an experiment of an ‘oddball’ paradigm , as a pilot
> test for the new EEG system in our lab. If anyone can give me some guidance
> on the following questions that will be really helpful and very much
> appreciated.****
>
> ** **
>
> What is the usual practise used for the number of epochs to average to get
> the ERP? If we take , say three randomised runs of the oddball experiment
> for the same subject will averaging the extracted epochs from individual
> runs be valid for the ERP?****
>
> ** **
>
> If anyone can direct me to some papers or references on experimental
> designs for ERP analysis that will be greatly appreciated.****
>
> ** **
>
> Many thanks in advance.****
>
> ** **
>
> Regards****
>
> Imali****
>
> ** **
>
> *Imali Thanuja Hettiarachchi*
>
> PhD Candidate****
>
> Centre for Intelligent Systems research****
>
> Deakin University, Geelong 3217, Australia.****
>
> Email: ith at deakin.edu.au
> www.deakin.edu.au/cisr****
>
> ** **
>
> [image: Description: Description: Description:
> cid:1216BE20-1800-4A47-8B9F-E7B9D94831CD at deakin.edu.au]****
>
> ** **
>
>
>
> ****
>
> ** **
>
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-- 
Makoto Miyakoshi
JSPS Postdoctral Fellow for Research Abroad
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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