I am making an experiment in which a trial consists of a picture followed by two rating screens (each asking for a rating of the picture). What I would like is to tell Superlab to choose a picture at random from a list/folder and then present each of the two rating screens. For as many trials as I have, I would like Superlab to continue to do this without replacement. That is, continually dip back into the folder for a picture (but not one seen previously) followed by the presentation of the two rating screens.
Is randomization for each trial --but without replacement across trials – possible?