Dear spm Experts,
I am desperately looking for help. I'm wondering if I set Flexible factorial design contrast rightly.
The experiment design is 2(group: patients, controls)*2(task: memory, perception)
1 Flexible factorial design
1) variance: subject (independence-yes, variance-equal); group (independence-yes, variance-unequal); task (independence-no, variance-equal);
Specify subjects: condition- [1 1; 1 2] / [2 1; 2 2]
Main effects & Interactions: Main effect, subject, 1; Main effect, group, 2；Main
effect, task, 3; Interaction, [2
3]
2) Contrast：F-contrast
Main effect group: 1 -1 0 0 0.5 0.5 -0.5 -0.5
Main effect task: 0 0 1 -1 0.5 -0.5 0.5 -0.5
Interaction group*task: 0 0 0 0 1 -1 -1 1
G1T1: 1 0 1 0 1 0 0 0
G2T1: 0 1 1 0 0 0 1 0
G1T1-G2T1: 1 -1 0 0 1 0 -1 0
G2T1-G1T1: -1 1 0 0 -1 0 1 0
G1T1-G1T2: 0 0 1 -1 1 -1 0 0
G2T1-G2T2: 0 0 1 -1 0 0 1 -1
I have referred to the paper (
Glascher & Gitelman, 2008)
two
groups, design 2.
