Dear SPM'ers
How do construct the design matrix in this case
4 subjects, 3x2=6 conditions in 3 runs for every subject
time course for conditions
session 1: 1 2 1 2 1 2 1 2 1 2 1 2 1
2: 3 4 3 4 3 4 3 4 3 4 3 4 3
3: 5 6 5 6 5 6 5 6 5 6 5 6 5
4: 1 2 1 2 1 2 1 2 1 2 1 2 1
5: 3 4 3 4 3 4 3 4 3 4 3 4 3
6:
etc
12: 5 6 5 6 5 6 5 6 5 6 5 6 5
Goal: how to specify the to-be-tested contrasts C1>C2, C2>C1, C3>C4,
C4>C3, C5>C6 and C6>C5 for the group?
Why should there be 48 elements in the contrast vectors?
What are the elements?
With regards,
Walter
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