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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rick reynolds
May 03, 2022 01:39PM
Yes, the first set of 20 betas (the unmodulated ones) should basically be the main effect. Note that any modulation values are first demeaned before being used to create additional regressors. So those regressors will be approximately orthogonal to the main ones, leaving the main ones to reflect the consistent, overall effect.

And to be clear, your hypothesis is that duration will affect amplitude above and beyond the amplitude of the convolution? The convolution amplitude effect has a unit height regressor for brief events (e.g. around 1s) convolving up to a height of more than 5 for long events (e.g. 12-15s+). It is not just a shape change. Just to be sure...

- rick
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Subject Author Posted

AM2 TENT Deconvolution Output

AMReye April 18, 2022 04:06PM

Re: AM2 TENT Deconvolution Output

rick reynolds April 19, 2022 10:26AM

Re: AM2 TENT Deconvolution Output

AMReye May 03, 2022 12:35PM

Re: AM2 TENT Deconvolution Output

rick reynolds May 03, 2022 01:39PM