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
May 02, 2006 10:36AM
> We have two separate scans of the same group of subjects. The
> subjects are engaged in different tasks during the two scans, and
> would like to compare them. Originally, we concatenated the two
> scans, and then ran a deconvolution analysis with follow-up t-tests
> on the concatenated dataset.

So it is an event-related design? How did you model the HRF with deconvolution analysis? And how did you run the t test of the contrast between the tasks?

> However, the results did not make any sense, leading us to
> suspect that our methods were off.

In what sense the results didn't make sense? Across all subjects? Can you provide a copy of the 3dDeconvolve script?

Gang
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Subject Author Posted

Analysis Recommendation

shruthi May 01, 2006 03:24PM

Re: Analysis Recommendation

Gang Chen May 02, 2006 10:36AM

Re: Analysis Recommendation

shruthi May 03, 2006 10:20AM

Re: Analysis Recommendation

Gang Chen May 03, 2006 05:35PM

Re: Analysis Recommendation

Rutvik Desai May 02, 2006 02:54PM