Hi, What are you referring to? Once I know what the design matrix looks like, I can tell you. Cheers, Jeanette On Wed, Feb 20, 2013 at 3:39 AM, Iyun Cherry Chen <[log in to unmask]>wrote: > Hi, FSLexperts, > > Sorry for keeping asking questions on this issue. I just don't get it why > the contrast to test [B1-B2] effect would be [0 2 1 0 0 0]? Why do we need > to multiply EV2 by 2 and take EV3 into account as well? > > Thanks in advance, > > Cherry >