Hi
We are setting up an event-related fMRI experiment. The lenght of our trial is 4000 ms (500 fixation + 3500 word presentation). The TR is 2000 ms. We have been suggested to use these jitter values: 0-2000-4000-6000 ms.
However, wasn't it the case that if the overall trial length was a multiple of the TR, the bold response was always sampled in the same points, leading to a poor estimation of the HRF? We would be grateful if you could clarify this issue.
Which jitter values would you suggest?
Thanks
Elisa
