 |
 |
Hi Maren, In addition to the case of variances not assumed to be the same as Jeanette commented, this setting can also be used in randomise to define exchangeability groups/blocks, which can be used with certain multivariate or longitudinal designs. So, it is an useful setting. There will be some documentation about this soon I hope. All the best, Anderson 2013/5/22 Jeanette Mumford <[log in to unmask]> > Hi, > > In my experience it may only be an advantage for very large sample sizes. > Otherwise, since it is defining groups in which separate between-subject > variances will be estimated, these estimates have lower df and may be > highly variable. Using one group only gives a single between-subject > variance estimate, but it should be a better estimate. > > Cheers, > Jeanette > > > On Wed, May 22, 2013 at 9:12 AM, Maren Strenziok < > [log in to unmask]> wrote: > >> Hi, >> I was wondering in which case it is appropriate to use the Group column >> in the Glm that is left from the first EV? I ask because I thought it might >> be usful to set up a design with independent groups, which does not seem to >> be the case according to the FSL Wiki. >> >> Maren >> > >