I’m trying to program the following experiment and having a bit of difficulty:
The participants for the experiment are to be split into 3 groups, each group will be presented with the same set of 21 images in a random order but as follows:
Group 1 will see images 1 -7 (Set A) 3 times each, images 8 - 14 (Set B) 6 times each and images 15-21 (set C) 9 times each.
Group 2 - Set A 6 times each, Set B, 9 times each, Set C 3 times each
Group 3 - Set A 9 times each, Set B 3 times each, Set C 6 times each.
(Note, images will not be repeated 3, 6 or 9 times stright after each other - that also needs to form part of the randomization).
I know that I can put each stimulus in 3, 6 or 9 times and then set up randomization at trial lvel and that this will give me the result I want - however, I want to use a more elegant solution that randomizes the trials and then the events and allows for the repeats to be done at trial level and for the repeats to be selected according to whiich group the participant is in - currently no matter what I put in the Condition Experiment box in the trial editor I can not get the trials to run through more than once each!
I’m enclosing the experiment (without stimuli) so that you can see the structure and offer advice if possible!
369repeats_exp_v3_01.sl4 (9.56 KB)