Hi Steve, Yes, this is an assignment I'm wokring on and my head hurts too! But the idea is that with a random block generater, when you are looking at the completed randomization list, you don't know what size any of the blocks are. Yes, if I know the block size is 4, then I will always be able to figure out at least what group every 4th person should be assigned to. But, if the block size is changing (and I don't know how or when), then I won't. So, if for example, I have a group of 40, essentially the code I'm looking for would randomly create blocks of 8, 4, 8, 12, 8 (or another combination) and each block is split 1:1. So when I'm looking at the final list, I really have no idea how the participants were ordered.
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