Dear AFNI experts,

We have data from a event-related experiment.
- The average duration of trials is 14 seconds (11.5 - 16.5 s);
- There are two events: Stimulus and Response. Stimulus starts at trial onset; Response starts 4.5, 5 or 5.5 seconds after trial onset.
- Individual level analysis: we are considering both a TENT (11 basis functions) and a GAM (Stimulus and Response regressors) approach.

While 3dMVM seems really appropriate to analyze TENT results at the group level, I was wondering if it would be appropriate to analyze also results from the GAM GLM with 3dMVM. My question is: can the two betas associated with the two regressors (Stimulus and Response) be considered multiple response functions (and be better analyzed in a single model with 3dMVM)?

Useful note. There is no collinearity in the GAM approach; the two activation maps are different and coherent with what was expected.
May-be-useful note. 2x2 factorial paradigm (2 voice types x 2 trial types).

Thanks,
Simone



Edited 2 time(s). Last edit at 02/05/2018 09:50AM by smndpln.