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

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Vincent Costa
December 04, 2007 02:19PM
Gang,

That's exactly what I would like to do. Specifically I am interested in determining whether there is stronger correlation for 5 of the conditions relative to the remaining control condition.

Besides using 3dANOVA instead of 3dttest to test the transformed correlation coefficients at the group level, how would the interaction contrast be computed with more than two conditions?

The effect due to this interaction at hemodynamic level is computed as

waver -GAM -peak 1 -TR 2 -input NR_CondA.1D -numout #TRs > HR_CondA.1D
waver -GAM -peak 1 -TR 2 -input NR_CondB.1D -numout #TRs > HR_CondB.1D

1deval -a HR_CondA.1D -b HR_CondB.1D -expr 'a-b' > InteractionContrast.1D
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Subject Author Posted

Context-Dependent Correlation with More Than Two Conditions

Vincent Costa December 04, 2007 08:12AM

Re: Context-Dependent Correlation with More Than Two Conditions

Gang Chen December 04, 2007 12:36PM

Re: Context-Dependent Correlation with More Than Two Conditions

Vincent Costa December 04, 2007 02:19PM

Re: Context-Dependent Correlation with More Than Two Conditions

Gang Chen December 04, 2007 05:19PM

Re: Context-Dependent Correlation with More Than Two Conditions

Vincent Costa December 06, 2007 12:29AM

Re: Context-Dependent Correlation with More Than Two Conditions

Gang Chen December 06, 2007 10:53AM

Using t-stat instead of R^2

Vincent Costa January 29, 2008 09:49AM

Re: Using t-stat instead of R^2

Gang Chen January 29, 2008 10:06AM