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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Jim Eliassen
May 13, 2004 05:25PM
Hi,

Sounds right! Multiply the beta weight by a 1D waver output file if you want to see what shape your data fit over several instances of a particular trial type. If your only interested in a single trial response, you can also just multiply the Cox Special by the beta weight.

All this really will tell you is what is the size of the assumed hemodynamic response shape (Cox special) present in your data. The response shape of the gamma function and the Cox special are fixed. If you were interested in seeing what kinds of differences in the temporal pattern of activation existed in your data, you'd need a set of basis functions. This allows the response shape to vary among different types of events.

-jim

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Subject Author Posted

mean time series/not TR locked question

Jane Lange May 07, 2004 12:37PM

Re: mean time series/not TR locked question

Jim Eliassen May 07, 2004 12:51PM

clarification

Jane Lange May 07, 2004 01:20PM

Re: mean time series/not TR locked

Jim Eliassen May 07, 2004 02:44PM

Re: mean time series/not TR locked

Jane Lange May 13, 2004 11:48AM

Re: mean time series/not TR locked

Jim Eliassen May 13, 2004 05:25PM