Thank you very much.but I have another question here.Why in SPM ,contrast of T test has only one row such as (-1 1),but Ftest can have many rows such as (1 0 0
0 1 0
0 0 1)
and I feel very confused about how to make a correct contrast for Ftest? For example,I have 20 subjects ,everyone have done a task with 3 conditions:rest,0back and 2back.When specify 1st level,I would like to do an Ftest to know all brainregions activated.Could you tell me how to make this contrast of Ftest?
Thanks a lot!
sisi