> stimulus presentation for an individual trial can range anywhere from 5-40 sec.

The duration varies substantially across trials even within each stimulus category (e.g., mut and neu)? If so, things are a little complicated as to how to handle such duration variability. There are at least two approaches to handling that: 1) model each trial separately, or 2) treat the duration as a modulatory variable using basis functions such as 'dmUBLOCK' in 3dDeconvolve.

> Since I'm only interested in the time series of certain ROIs, I've created an ROI mask file where each ROI (32 in total) is given
> its own value. Would I be able to pass this file (containing all ROIs) through 3dDeconvolve's -mask option, or does the mask
> have to contain just one ROI at a time?

Yes, it would work with the option '-mask' in 3dDeconvolve. However, CSPLIN(0,20,4) won't properly handle the issue of duration variability.

Gang



Edited 1 time(s). Last edit at 10/15/2018 04:56PM by Gang.