[FieldTrip] 2x3 anova in cluster analysis

[Stanley Klein]

Nico,

Your question gives me the chance to ask something I've been curious about.
It seems to me that one of the nifty things about permutation cluster
analysis is that it allows you to do anything that seems reasonable as long
you decide on the process ahead of time and don't do any future tweaking
other than fixing coding errors. I'm curious whether the Fieldtrip code
make it easy to insert new statistics modules.

I presume your actual question had to do with whether Fieldtrip already has
the possibility of doing that 2x3 ANOVA.  I suspect it doesn't have that
capability. However, it would be nice if the permutation cluster analysis
could be made sufficiently modular that one could make use of all the
complicated clustering and permuting and all, but enable the user to
substitute their own statistical method.  I haven't actually watched my
students doing the nitty-gritty use of Fieldtrip's version of the
permutation test (other than knowing that is is very nice and well
documented) so I don't know how easy it is to stick in one's own favorite
statistic, but I'm hoping it is easy.

Stan

On Mon, Dec 5, 2011 at 4:58 AM, Nico Alexander Willi Kremers <
nkremers at uni-bonn.de> wrote:

>
> Hi,
>
> I followed the discussion about implementing a 2x2 within subjects design
> into a cluster statistic with much interest. I want to implement a 2x3
> repeated measure anova in a cluster analysis using fieldtrip. I think for
> this type of analysis subracting two conditions from each other and then
> calculate a ttest is not appropriate. Is there another way of calculating
> the interaction effect between the two factors and generate clusters for
> real and permutation data? What specifications must be set and how?
>
> Thank you very much for your answer,
>
> Nico
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