intergroupavg-sess -analysis <analysis> -contrast <1v2> -group1 <group1> -group2 <group2> -intergroup <group1vgroup2> -space sph -spacedir sphsm<XX>
intergroupavg-sess -analysis <analysis> -contrast <1v2> -group1 <group1> -group2 <group2> -intergroup <group1vgroup2> -space sph -spacedir sphsm<XX>