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 01, 2019 05:30PM
For a 2 x 2 structure, the F-test for the interaction between factors A and B is essentially equivalent to the t-test (A1B1-A1B2)-(A2B1-A2B2) or (A1B1-A2B1)-(A1B2-A2B2). Even better, you get more information from the t-test than F because t-test directly provides the sign/directionality for the associated effect; for example, a positive t-value shows A1B1-A1B2 > A2B1-A2B2 and A1B1-A2B1 > A1B2-A2B2.

The same goes with the two main effects.

Gang



Edited 1 time(s). Last edit at 10/01/2019 05:35PM by Gang.
Subject Author Posted

2x2 anova with multiple comparisons correction

bb2958 October 01, 2019 02:59PM

Re: 2x2 anova with multiple comparisons correction

gang October 01, 2019 04:23PM

Re: 2x2 anova with multiple comparisons correction

bb2958 October 01, 2019 04:53PM

Re: 2x2 anova with multiple comparisons correction

gang October 01, 2019 05:30PM

Re: 2x2 anova with multiple comparisons correction

bb2958 October 02, 2019 01:50PM

Re: 2x2 anova with multiple comparisons correction

bb2958 October 04, 2019 03:25PM

Re: 2x2 anova with multiple comparisons correction

gang October 04, 2019 04:42PM