Whoops! Sorry, Ken. Made a mistake. You're design is orthogonal
(see below).
A B C D E F
A 1.0 0.0 0.0 0.0 0.0 0.0
B 0.0 1.0 0.0 0.0 0.0 0.0
C 0.0 0.0 1.0 0.0 0.0 0.0
D 0.0 0.0 0.0 1.0 0.0 0.0
E 0.0 0.0 0.0 0.0 1.0 0.0
F 0.0 0.0 0.0 0.0 0.0 1.0
I am also going to check the design I suggested, which has 25 trials,
to be sure that is also orthogonal. Of course, as you said, this
would be a main-effects only design.
John
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