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 08, 2021 01:41PM
Hi Gang,

Thanks for the reply. Let me make sure with you about the interaction, and let's forget about the frequency just for simplicity:

my script was:
a1b1-a1b2-a2b1+a2b2
My understanding is: this is (a1b1-a1b2)-(a2b1-a2b2), it will contrast (b1-b2)'s differences in a1 and a2 condition, so that if there is any interaction effect, it will show.

Your suggestion was:
a1b1-a1b2-a2b1-a2b2
I don't understand why this would be the way to show interaction.
according to [afni.nimh.nih.gov] , it seems my script was consistent with your previous post.

Can you elaborate a little bit?

Thank you!
Subject Author Posted

single subject ANOVA using 3dDeconvolve

swallowwly October 07, 2021 01:25PM

Re: single subject ANOVA using 3dDeconvolve

gang October 08, 2021 01:15PM

Re: single subject ANOVA using 3dDeconvolve

swallowwly October 08, 2021 01:41PM

Re: single subject ANOVA using 3dDeconvolve

gang October 08, 2021 03:20PM

Re: single subject ANOVA using 3dDeconvolve

swallowwly October 11, 2021 12:05AM