I was wondering how we can ensure that e.g. in an experiment with four different lists each list is completed by exactly the same number of participants. As in principle, several participants could do the study at the same time we did not figure out so far, how we can control this, especially if we do not want a list to be counted as "used" every time someone clicks on the study link but only if the study completes and data are saved.
I was thinking that probably this could be done using the batches and somewhere in my experiment script write a condition assorting each batch number or name a list. Is this possible? How exactly could it work (using jspsych)?