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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January 06, 2010 01:54PM
Hi Gang,

when we run conjunction analyses with the expression step(v-A)*step(w-B) we are looking for common ACTIVATIONS between the two contrasts that are in fact two-tailed. But in this case, the level of significance for the voxels in the conjunction is not the one associated with A, but is double.

In other words, if you are looking for common activations, shouldn't you use one-sided t tests?

Thanks
E
Subject Author Posted

conjunctions

Elisa December 27, 2009 02:38AM

Re: conjunctions

Gang Chen December 28, 2009 03:55PM

Re: conjunctions

Elisa January 06, 2010 01:54PM

Re: conjunctions

Gang Chen January 06, 2010 05:36PM

Re: conjunctions

Elisa January 08, 2010 10:03AM

Re: conjunctions

Gang Chen January 08, 2010 10:50AM