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  

|
April 08, 2022 07:45AM
Maegan,

One possibility is that a lot of data variability was not accounted for in the model; thus, the high spatial correlation could lead to a small cluster size threshold. Are you trying to assess the contrast between two conditions? If possible, try 3dttest++ with either '-Clustsim' or '-ETAC', and see if the results are more reasonable.

Another option is to adopt a different reporting approach: [afni.nimh.nih.gov]

Gang
Subject Author Posted

small 3dClustSim threshold

mcalvert January 06, 2022 02:20PM

Re: small 3dClustSim threshold

rick reynolds January 10, 2022 01:21PM

Re: small 3dClustSim threshold

mcalvert March 30, 2022 01:42PM

Re: small 3dClustSim threshold

gang April 08, 2022 07:45AM