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 17, 2008 05:48PM
> In this situation, in the same cluster-wise threshold (p<.05), can I use a lower
> voxel-wise threshold (p<.015) and a higher spatial threshold (e.g., 20) based
> on the AlphaSim?

Sure you can do that. In fact you use any combination of voxel-wise p-threshold and cluster size threshold you feel comfortable with. For reference you can cite the following:

Forman SD, Cohen JD, Fitzgerald M, Eddy WF, Mintun MA, Noll DC (1995): Improved assessment of significant activation in functional magnetic resonance imaging (fMRI): use of a cluster-size threshold. Magn Reson Med 33: 636-647.

Ziad S Saad, Gang Chen, Richard C Reynolds, Patricia P Christidis, Kenneth R Hammett, Patrick S F Bellgowan, Robert W Cox (2007), Functional imaging analysis contest (FIAC) analysis according to AFNI and SUMA. Human Brain Mapping, Volume 27 Issue 5, Pages 417 - 424.

Gang
Subject Author Posted

AlphaSim

Woogul Lee October 17, 2008 10:08AM

Re: AlphaSim

rick reynolds October 17, 2008 05:36PM

Re: AlphaSim

Woogul Lee October 17, 2008 06:36PM

Re: AlphaSim

rick reynolds October 17, 2008 08:08PM

Re: AlphaSim

Woogul Lee October 17, 2008 09:27PM

Re: AlphaSim

Woogul Lee November 15, 2008 06:12PM

Re: AlphaSim

Gang Chen November 17, 2008 05:48PM

Re: AlphaSim

Woogul Lee November 17, 2008 07:43PM