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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Zhihao_Li
January 03, 2018 04:34PM
Happy new year to Bob and AFNI Team!
I was trying to play with the new "ETAC" option in 3dttest++ and noticed an issue that I don't understand.
I simply added "-ETAC" in a command line of regular 3dttest++ without any other options of ETAC_blur or ETAC_opt, requesting the ETAC procedure to be computed by default. In the outputs, I can see "significant" (p<0.001/voxel with a cluster size determined by regular 3dClustSim) activations in the "main t-test" file but all the TT.*.default.ETACmask* files are empty (all voxel values are zero) indicating no significant activation at all. Since my intuition about ETAC is sort of to combine significant activations at different threshold levels, so any significant activation seen in the "main t-test" should warrant a non-empty ETAC result. Am I right? Did I do anything wrong?



Edited 1 time(s). Last edit at 01/05/2018 12:28PM by rick reynolds.
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No result with ETAC?

Zhihao_Li January 03, 2018 04:34PM