[FieldTrip] Cluster analysis on correlation statistics

[Arjen Stolk]

Hey Chris,

We've recently included a function, ft_statfun_intersubcorr, that seems to
do what you're asking for (i.e. a brain-behavior correlation across
subject/trials). It works fine, but given that it hasn't been fully
accommodated, it has yet not been documented. Please check the help for
further instructions on how to use this function.

Best regards,
Arjen



2014-12-08 15:56 GMT+01:00 Maris, E.G.G. (Eric) <e.maris at donders.ru.nl>:

>  Hi Chris,
>
>   Just to clarify my last email: I'm referring to correlation between
> either single trial data within subject, or averaged ERPs across subjects,
> with a behavioral variable. Not linear regression across conditions as is
> already implemented in the ft_statfun_depsamplesregrT function.
>
> For correlating/regressing single trial data of a single subject, you use
> the ft_statfun_indepsamplesregrT (with the units-of-observations being the
> trials, which each correspond to one column of your design matrix).
>
> For correlating/regressing subject-averaged data of a group of subjects,
> you also use the ft_statfun_indepsamplesregrT (with the
> units-of-observations being the subjects, which each correspond to one
> column of your design matrix).  Note, in this case your behavioral data
> (accuracy or RT) or also subject averages.
>
> Best,
>
> Eric Maris
>
>
>
>   ------------------------------
> *Van:* Dr C A Brown [cb802 at cam.ac.uk]
> *Verzonden:* zaterdag 6 december 2014 12:33
> *Aan:* fieldtrip at science.ru.nl
> *Onderwerp:* Re: [FieldTrip] Cluster analysis on correlation statistics
>
>   Hello again,
>
>  Just to clarify my last email: I'm referring to correlation between
> either single trial data within subject, or averaged ERPs across subjects,
> with a behavioral variable. Not linear regression across conditions as is
> already implemented in the ft_statfun_depsamplesregrT function.
>
>  Many thanks
> Chris
>
>  Dr Christopher Brown
> Research Associate
>
>  Sent from a mobile device, please excuse my brevity.
>
> ----- Reply message -----
> From: "Christopher Brown" <cb802 at cam.ac.uk>
> To: <fieldtrip at science.ru.nl>
> Subject: Cluster analysis on correlation statistics
> Date: Sat, Dec 6, 2014 07:49
>
> Dear all
>
> I would like to use the cluster analysis functions in Fieldtrip on
> correlation statistics. I note there has been some discussion about this on
> this list in the past but I haven't come across the necessary
> ft_statfun_corr function to allow this analysis. It would be great if
> somebody has this code and could share it with me; otherwise, I will embark
> on writing it myself and sharing my results with everyone for feedback.
> Being new to Fieldtrip I would greatly appreciate any collaborative help
> with this. May I check my understanding on something before getting
> started: To allow for multiple comparisons correction using monte carlo for
> example, as part of a cluster analysis, I presume the output of the
> function must be t values rather than correlation coefficients? Any other
> hints as to how to write this are most welcome.
>
> Kind regards
>
> Chris
> --
>
> *Dr Christopher Brown* *Research Associate **| CamPain Group **| Division of Anaesthesia | School of Clinical Medicine | University of Cambridge*
>
>
> Box 93
> Addenbrooke's Hospital
> Hills Road
> Cambridge CB2 0QQ
>
> 01223 256 995
>
>
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