Hi! FS Experts!

In the fMRI experiment, there are 2 conditions:

1# 3D picture

2# zero disparity picture

interleaved with fixation block (0).

To compare 3D-vs-zero disparity, I used command:

mkcontrast-sess -a 1 -c 2 -nosumconds

but the results showed more activation then expected. To find the problem, I compared 3D-vs-fix (-a 1 -c 0), the result shows the same as 3D-vs-zero disparity.

My question is:

why the two contrast ( [1 0; 0 -1] and [1 0] ) came to the same result? How can I compared the  two conditions?

Thanks a lot !

Yours,

Star 