I'm trying to create an IAT with a specific number of times each word appears in the blocks. There are 8 words per category and 4 categories. I need each word to appear once in compatibletest1, totalizing 32 trials, and twice in compatibletest2, totalizing 64 trials. I need incompatible blocks with the same patern. Words should be selected randomly, but there must be a rule that indicates how many times they will appear. Does anyone know how to program this?