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

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Gang Chen
October 03, 2005 02:17PM
> Is it statistically inappropriate to make such a comparison
> (i.e., problem with unequal variances when looking at 1 TR
> vs 4 TR?)

The issue of efficiency (power) for each condition aside, the comparison itself should not be a problem during individual subject analysis.

> My strategy thus far has been to extract the percent
> signal change at each of 11 time points, then use
> 3dANOVA3 with subjects, time, and condition as factors.
> Would alternate methods offered by AFNI be more
> appropriate? Any suggestions?

What are those 11 time points? Time lags from deconvolution?

If you decide to run group analysis with 3dANOVA3, make sure you have the most recent version of it. And it does not have the capability of running 2nd-order contrasts yet.

Gang
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Subject Author Posted

fast event related analysis

Chuck October 03, 2005 12:44PM

Re: fast event related analysis

Gang Chen October 03, 2005 02:17PM