Hi,
We are doing PPI analysis looking at the interaction of a seed region from
the caudate with a contrast of two EV. However, we got a negative result for
PPI. I have attached the design.
I am modeling 3 EVs for PPI, the first is EV for PSY, and the second one is
EV for PHYS, the third one is EV for PPI. The others are all the other task
EVs which were in the GLM model. Based on the PPI result, the result for PSY
was much different compared with the regular result of same contrast
between the two EVs. Something must have been wrong. Could you please
help us with this?
Thanks in advance,
Yang
EV for PSY:
0 16.01 -1
34.04 14.01 1
65.06 18 1
102.09 10.01 -1
129.11 14.01 -1
162.14 10.01 1
190.18 18 -1
225.19 16.01 1
259.23 12.02 1
290.27 14.01 -1
322.31 10.01 1
351.34 12.02 -1
380.37 18 -1
416.4 16.01 1
449.43 12.02 -1
479.47 16.01 1
...
EV for PHYS:
12599.6
12510.9
12369.7
12461.1
12513.8
12542.6
12531.6
12533.1
12512.8
12506.1
12530.4
12555.9
12531.5
12489.2
12488.8
12541.9
12530.7
...
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