Hello,

May I ask for your recommendation on the appropriate time resolution to use when preparing a task timing file?

In our case, event onsets and durations are defined based on concurrent EEG recordings, and their time resolution is rounded to 0.1 seconds. Should I use this resolution directly when preparing the timing 1D file, or is it better to align them to the TR grid? My understanding is that, in AFNI the basis functions are treated as continuous. Therefore, the task regressor is sampled at the TR resolution after convolving the event and basis function at a much higher resolution.

If this is correct and TR=2 seconds, is it still better to use BOLCK(0.2, 1) instead of BOLCK(1, 1), even if the difference of the final generated regressors may be negligible?

If I would like to use duration modulation dmUBLOCK(x) and x is calculated by the median of all durations, I guess it is not necessary to round x?

Thanks,
Zhengchen