I'm conducting an experiment, where I have two conditions, in condition 1, they have to memorize a list of words for 30 seconds and then type how many words they remembered. In condition 2, a different sample of participants has to memorize the same list of words for 60 seconds and then type how many words they remembered. My question is how would I set it up so that condition 1 and condition 2 are randomized, and no participants are assign to both.