AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

History of AFNI updates  

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November 16, 2009 04:27PM
In principle, one can replace the data (FMRI amplitudes) with their ranks, and then do ANCOVA -- this is suggested in the paper

Analysis of Covariance Using the Rank Transformation,
W. J. Conover and Ronald L. Iman
Biometrics, Vol. 38, No. 3, Special Issue: Analysis of Covariance (Sep., 1982), pp. 715-724

How well this will work with FMRI data is an interesting question. I think you could try this using '3dTsort -rank' if you first created a single dataset comprising the desired betas for analysis in the various sub-bricks. Then use 3dLME to carry out the analysis. Maybe it would work.

Subject Author Posted

non-parametric tests with covariate

Andrew Mayer October 07, 2009 01:13AM

Re: non-parametric tests with covariate

Gang Chen October 07, 2009 11:51AM

Re: non-parametric tests with covariate

Guofan November 16, 2009 04:10PM

Re: non-parametric tests with covariate

bob cox November 16, 2009 04:27PM

Re: non-parametric tests with covariate

Guofan November 16, 2009 05:34PM

Re: non-parametric tests with covariate

bob cox November 17, 2009 09:16AM

Re: non-parametric tests with covariate

Colm Connolly November 17, 2009 10:07AM

Re: non-parametric tests with covariate

bob cox November 16, 2009 08:58PM

Re: non-parametric tests with covariate

Guofan November 17, 2009 02:42PM