The tricky thing with an f-contrast is that there isn't a single mean as you are testing a group of contrasts simultaneously in a "are any of these significant?" test. In FSL you cannot bring lower level f-contrasts to the higher level, but will work with single contrasts instead.

Jeanette

On Mon, Feb 4, 2013 at 8:18 AM, Mark <[log in to unmask]> wrote:

Hi,

Sorry this might be a simple question but I just don't know how.....

In my first-level feat model, I have a F contrast as well as many t contrast. I want to see the group mean of the F contrast. However, when I set up a group mean contrast using 1s in the higher-level model, I can only see the group average of t contrasts.

How can I see group mean of F contrast?

Thanks.

Mark