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.
Do you have multiple values per subject under each condition (level of factor A)? If yes, you use option -fb or -fab. With -fab, you will get two sub-bricks with the first being MSB and the second MSE. Then you obtain MSE using 3dcalc.
However, if the answer is no, then there is no way to differentiate MSAB and MSE, and you would simply consider MSAB as the within-subject MSE.