I have been attempting to get the timing right on a paradigm that I hope to use for fMRI - and hence the timing needs to be accurate. I understand that when presenting images the screen refresh rate comes into play, and have checked out other threads about timing problems. The refresh rate on the laptop I’m using is 60 Hz; I followed the formula of allowing 16.7ms for the 1st refresh (to draw the buffer to the screen) / n refreshes to the time limit / and 1 more refresh to erase the stimulus. I adjusted the “end” times accordingly for each event.
Unfortunately, the fun run of the experiment is still +10 seconds out, which is too much for fMRI. Do you have any other suggestions as to the best way to calculate the “end” time for each event so that it will run on time?