Dear List
I have to do a quadruple T-Test, and I know from the triple t-test example on your site that the design is counterintuitive. Can you check my design?
In this example, I have 2 subjects, scanned under 4 conditions.
A=a+b
B=-a
C=-b
D=-c?
EV1 EV2 EV3 EV4 EV5 EV6
1 1 1 1 1 0
1 1 1 1 0 1
-1 0 0 0 1 0
-1 0 0 0 0 1
0 -1 0 0 1 0
0 -1 0 0 0 1
0 0 -1 1 1 0
0 0 -1 1 0 1
B-A= (-a)-(a+b)
= -2a -b
C-A=-b - (-a) = -b+a
D-A = -c - (a+b) = -c -a -b
B-C = -a--b =(-a +b)
B-D=-b--c = -a +c
EV1 EV2 EV3 EV4 EV5 EV6
B-A -2 -1 0 0 0 0
C-A 1 -1 0 0 0 0
D-A -1 -1 -1 0 0 0
B-C -1 1 0 0 0 0
B-D -1 0 1 0 0 0
Is this correct?
Thanks
Jen
Jennifer Bramen, Ph.D.
Assistant Research Neuroscientist
David Geffen School of Medicine at UCLA
Developmental Cognitive Neuroimaging
635 Charles Young Drive South
Los Angeles, CA 90095-7332
Phone: (310)267-5116
Fax: (310)525-0865
Email: [log in to unmask]
Campus Mail Code 176919
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