[FieldTrip] statfun_depsamplesregrT

Eric Maris e.maris at psych.ru.nl
Thu Mar 22 21:12:35 CET 2012

Dear Marcin,



The statfun_depsamplesregrT calculates a T-statistic for regression
coefficients that are calculated within each of the units-of-observation
(typically, participants) obtained by regressing the subject-specific data
(spatiotemporal, spatio-spectral, spatio-spectro-temporal) on some
predictor variable that varies over the different conditions in which this
participant has provided data (e.g., working-memory load, retention
interval, luminance, contrast, etc). If you doubt the assumed linear
relation between predictor variable and biological data, then you could
write your own statfun_depsamplesrankcorr. To use this test statistic for
cluster-based permutation inference, you need a threshold based on some
reference distribution (which can be parametric, but must not be). 


To get this statfun_depsamplesrankcorr running, you will probably have to
take a look in the Fieldtrip code to see how the statistics framework is




Eric Maris



From: Marcin [mailto:m.leszczynski.m at googlemail.com] 
Sent: woensdag 21 maart 2012 10:51
To: Email discussion list for the FieldTrip project
Subject: [FieldTrip] statfun_depsamplesregrT


Dear Fieldtripers,

Could anyone explain me what is being calculated with the
statfun_depsamplesregrT function, please.

David Groppe (thank you David) suggested in a previous thread on the list
that I might calculate permutation test based on rank correlation to
account for monotonic relationships within the permutation framework. I
was wondering if this is the kind of test that statfun_depsamplesregrT
function calculates.


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20120322/326b5b2f/attachment-0002.html>

More information about the fieldtrip mailing list