[Eeglablist] Subjects number in ERP experiment

[Makoto Miyakoshi]

Dear Ahmed,

> How much the minimum size of subject is required in an ERP experiment?

Friston says 16. Below I copied an excerpt from Friston (2012) 'Ten ironic
rules for non-statistical reviewers' I haven't read the paper in details
and I hope he is not ironic in this part :-)

In conclusion, we have framed a fallacy of classical inference in terms of
effect sizes and have argued that the optimum experimental design should
sensitize inference to large effect sizes, while desensitizing inference to
trivial effect sizes. For classical inference, based on alpha(0), this
leads to an optimum number of subjects of about 16.

Makoto

On Sat, Jun 20, 2015 at 10:31 AM, Ahmed Almurshedi <ahmed19875000 at yahoo.com>
wrote:

> Dear All,
>
> I can I see i variety of ERP experiments some researcher used very wide
> range of participant may exceed 100 samples.
> While some others deals with limited number of samples which maybe around
> 12 subjects.
> My question is:
> How much the minimum size of subject is required in an ERP experiment?
> What is the criteria to choose the number of participants?
> If so how to calculate it statistically?
>
>  I have goggled it and find some suggest around 30-40 subjects. as in the
> following link
>  Sands Research - White Paper: Sample Size Analysis for Brainwave
> Collection (EEG) Methodologies
> <http://www.sandsresearch.com/WhitePaperSampleSize.aspx>
>
>
>
> [image: image] <http://www.sandsresearch.com/WhitePaperSampleSize.aspx>
>
>
>
>
>
> Sands Research - White Paper: Sample Size Analysis for B...
> <http://www.sandsresearch.com/WhitePaperSampleSize.aspx>
> View on www.sandsresearch...
> <http://www.sandsresearch.com/WhitePaperSampleSize.aspx>
> Preview by Yahoo
>
>
>
> Please share your comments..
>
>
> *Ahmed Almurshedi*
>
>
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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