I’m trying to present the same set of words (from a stimulus list) several times over, in random order each time, at increasing display times for each repeat of the set. In other words, a participant should see every word in the list at 20ms, then the same list again at 40ms, etc. The task involves making a judgement about the word on a subsequent masked event so that each trial is structured:
My initial approach has been to use a trial variable (which I’ve called “display duration”) that specifies my display time values, and make the level selection sequential. I then end the display word event after a variable time limit, taking the times from the display duration variable.
My problem is that I can’t figure out what I should specify in the “Restart sequence before start of…” option in the trial variable settings. I want it to run through the same sequence of values once per participant, but if I restart sequence by experiment (or block), then each successive word uses a new display time as it continuously cycles through the display values. If I restart sequence by trial, then each repeat of the word set is shown at the first display value (shortest time).
I’ve also tried creating duplicate trials and/or blocks to try to trigger the sequence I want, but no success.
Is what I’m attempting possible using a trial variable? Or will I have to expand the stimulus list into multiple events and set the display times separately?
Any help appreciated!