I have some questions about issues brought up on this page:
Our trigger sends an “=” sign when the scan is starting so that the stimulus presentation can start at the same time as the scanner. I programmed SuperLab to look for this “participant input” before starting the other events.
I’m confused by the sentences “And last but not least, you need to link this event to all your trials. You can create just one event and link it to all the trials.” Why would you be linking it to all your trials? The way my program is set up is that there are about 50 trials of about 18 seconds each. Why would the trigger event be synced to all of the trials?
I am wondering about the section “Why using time limits doesn’t work well” and its impact on data analysis for MRI paradigms. If a cue that is supposed to last 5 seconds takes a little more than 5 seconds each time, wouldn’t that build up over the course of the experiment and cause a delay by the end of the experiment? If there is a delay, fMRI analysis becomes hard because you can’t reliably identify the timepoints when a subject was seeing certain stimuli.
I am confused about whether that last section applies only to the “software only” section or if it somehow can be avoided if you are triggering via the scanner.