I am using SuperLab to run a change detection study in which a single trial consists of four events: (1) a focal point is presented (for 500 ms) followed by (2) a picture (for 750 ms) followed by (3) a focal point (for 500 ms) and finally (4) the same picture with a change (which I would like to display for only 750 ms).
I have added feedback to this last picture so that the trial will repeat if the participant does not enter a response within the time limit. However, my problem is that this last event then appears for much longer than 750 ms (even though this is the time I designated in the “input” page of the event). I have even tried to compensate by shortening the time limit of this trial, but it does not seem to make a difference.
Why is it taking so long to “cycle back” and repeat the trial? How can I fix this to that the last image is presented for the same duration as the first (i.e., 750 ms)?
Thanks so much for the help,