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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October 28, 2009 06:48PM
Hi Rick,

Thank you very much! I have run the 3dANOVA again in the way that you suggested.

3dANOVA -DAFNI_FLOATIZE=YES \
-levels 3 \
-dset 1 participant_1_S1+tlrc \
-dset 1 Participant_2_S1+tlrc \
-dset 2 participant_1_S2+tlrc \
-dset 2 Participant_2_S2+tlrc \
-dset 3 participant_1_S3+tlrc \
-dset 3 Participant_2_S3+tlrc \
-ftr ftest \
-diff 1 2 S1vsS2 \
-contr 1 -0.5 -0.5
-mask group_mask+tlrc
-bucket contrast

My mask has 1005930 voxels (1*1*1 mm).
And whe I look the result of '-diff S1vsS2', p=0.0749, and q=0.9999. I do not know why.
Another question is the difference between the result of the 3dANOVA and the 3dttest. I also used the 3dttest to do 'S1 vs S2', and compared with result from 3dANOVA, when I get the similar activation map, p= 0.005 for 3dttest, and p=0.0749 for '-diff S1vsS2'. Why is there so great difference?

when I look the result of '-contr 1 -0.5 -0.5 ', p=0.0088, q=0.6593. Is it because that my mask is too big?

Best,
Pengmin
Subject Author Posted

about '-contr' in 3dANOVA

Pengmin October 27, 2009 03:44PM

Re: about '-contr' in 3dANOVA

rick reynolds October 27, 2009 04:18PM

Re: about '-contr' in 3dANOVA

Pengmin October 27, 2009 05:59PM

Re: about '-contr' in 3dANOVA

rick reynolds October 27, 2009 06:18PM

Re: about '-contr' in 3dANOVA

Pengmin October 28, 2009 12:06AM

Re: about '-contr' in 3dANOVA

rick reynolds October 28, 2009 09:47AM

Re: about '-contr' in 3dANOVA

Pengmin October 29, 2009 11:04PM

Re: about '-contr' in 3dANOVA

rick reynolds October 30, 2009 09:20AM

Re: about '-contr' in 3dANOVA

Pengmin October 30, 2009 10:43AM

Re: about '-contr' in 3dANOVA

Gang Chen October 28, 2009 05:51PM

Re: about '-contr' in 3dANOVA

pengmin October 28, 2009 06:48PM

Re: about '-contr' in 3dANOVA

Gang Chen October 28, 2009 07:02PM

Re: about '-contr' in 3dANOVA

Pengmin October 29, 2009 09:02AM

Re: about '-contr' in 3dANOVA

Gang Chen October 29, 2009 01:59PM

Re: about '-contr' in 3dANOVA

Pengmin October 29, 2009 08:50PM

Re: about '-contr' in 3dANOVA

pengmin October 28, 2009 07:01PM