Reply-To: | | [log in to unmask][log in to unmask]> wrote: Hi Darren, > >Interesting, could you please comment on that point ? >Tried to look for these posts but could't find them. Thanks a lot, > >Best wishes > >Swann > > >2010/10/4 MCLAREN, Donald <[log in to unmask]> > > >Actually, if you want to use a contrast. You should use the contrast [1 -1 -1 >-1] since this will compare A against B,C,D. However, this assumes that B-D are >the same in connectivity and that they are in the opposite direction of A. Using >the -1/3 assumes that the connectivity is 3 times as great in condition A than >the other conditions. There have been emails on why the contrasts need to be the >same amplitude previously and do not need to sum to zero either. >> > >-- >Swann Pichon, PhD >Laboratory for Behavioral Neurology and Imaging of Cognition >Department of Neuroscience, University Medical Center >1 rue Michel-Servet, 1211 GENEVA 4, Switzerland >Tel: +41 (0)22 379 5979 >Fax: +41 (0)22 379 5402 >Gsm: +33 (0)6 26 43 83 61 >[log in to unmask] |