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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August 08, 2003 05:46PM
If I understand you correctly, you have 4 regressors: A1, A2, B1, and B2. Then the main effect of those 4 types of stimuli would be automatically in the output from '-fout ... prefixname'.

Assume you run 3dDeconvolve with -polort 1. Yes, to test whether (A1+A2) - (B1+B2) = 0, (A1+B1) - (A2+B2) = 0, and (A1-A2) - (B1-B2) = 0, go with the following respectively:

0 0 1 -1 1 -1
0 0 1 -1 1 -1
0 0 1 -1 -1 1

Gang
Subject Author Posted

interaction contrast

Elizabeth Felix August 08, 2003 05:15PM

Re: interaction contrast

Gang Chen August 08, 2003 05:46PM

Re: interaction contrast

Elizabeth Felix August 08, 2003 05:51PM