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How do I set up my survey so an individual participant completes a different block each attempt?
My survey instrument includes three randomized blocks of questions. Participants complete the survey three times over two years, and a different block each time. How do I set up the survey so that individuals get a different block each time they click the survey link and can only complete the survey a total of three times? It is important for the blocks to remain random so that I get an even spread of completed blocks over each time interval.