[pymvpa] How you run permutation test for search-light analysis?

[Vadim Axel]

Hi,

When I run a whole-brain search-light analysis with non-overlaping lights
(each voxel participates only in one light) I get about 3000 lights (half a
hour classification). Running 1000 times such permutation analysis would
obviously take weeks.  And this is a limited non-overlapping lights case.
Is there any more realistic approach? I found here that people ran
permutation analysis only 10 times while they stack the predictions of all
voxels together to have their chance distribution:
http://cercor.oxfordjournals.org/content/early/2011/12/20/cercor.bhr357.full
(see "Searchlight analysis" section second paragraph). Does it make sense
for you?

Thanks,
Vadim
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