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Dear SPMer, I have a question about setting up the 1st-level test. I have a block design of 20 sec block duration, (20 sec on - 20 sec off, for total 6 blocks) But the number of scans in one block differs. ( e.g. the first block has 8 scans, the second has 9, and so on...) If I want to setup this design, is there a good way to do so? My TR is also not integer, it is 1.46 sec. Cheers Stacy