Use a Trial Variable to display your numbers in the form of XXXXX. You will need to select Screen Location as the type of trial variable. Create your screen location levels for the 5 numbers you want to be displayed. Then, create 5 more positions that are not visible on screen. After you have 10 level positions created, go to the “Level Selection” tab. Under, “Use the following order:” select Random With No Replacement.
All 10 numbers need to be in a separate event. The first 9 events need to end “Immediately after the event is presented.” The last event should end after a correct response or a time limit.
In the Event Editor, for each of your 10 events, go to “Settings,” then “Position.” Under “The position of the picture is:” select Variable. Then, under “Select the variable” choose the Screen Location Trial Variable you created.
Under Presentation Option in the Event Editor:
Event 1: Erase Screen before presenting stimulus and Keep stimulus invisible is selected.
Event 2-9: Only have Keep Stimulus invisible selected.
Last event: Erase Screen before presenting stimulus and Keep stimulus invisible are NOT selected.