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
October 22, 2012 04:59PM
> Would I still use PPI if I'm not interested in a specific task condition
> (i.e. I wouldn't be looking at connectivity of an ROI for a contrast between
> two conditions)?

PPI, in its typical usage, explores the interaction between a seed region and the rest of the brain under one condition or the contrast of two conditions.

> The simple correlation analysis indicated that it could be used for both rest and task.

With both rest and tasks, simple correlation would show the overall signal similarity between a seed region and other regions during both rest and all tasks in the experiment. Such an overall measure seems very vague because of the mixture of rest and tasks.

Gang
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Subject Author Posted

simple correlation analysis

Anita October 21, 2012 05:21PM

Re: simple correlation analysis

Anita October 21, 2012 06:36PM

Re: simple correlation analysis

gang October 21, 2012 07:34PM

Re: simple correlation analysis

Anita October 22, 2012 01:42PM

Re: simple correlation analysis

gang October 22, 2012 04:59PM