Dear Doug,
I would like to be sure that I've understood the rules for the following
contrast in a 2x2x2 design with diagnosis (D1, D2), gender (Male, Female) and
handedness (Left, Right) as discrete factors.
D1MaleLeft
D1MaleRight
D1FemaleLeft
D1FemaleRight
D2MaleLeft
D2MaleRight
D2FemaleLeft
D2FemaleRight
interaction between Diagnosis, Gender, and handedness
[ 1 -1 -1 1 -1 1 1 -1]
interaction between Gender and handedness for D1
[ 1 -1 -1 1 0 0 0 0]/2
interaction between Gender and handedness for D2
[ 0 0 0 0 -1 1 1 -1]/2
interaction between Diagnosis and handedness for Males
[ 1 -1 0 0 -1 1 0 0]/2
interaction between Diagnosis and handedness for Females
[ 0 0 1 -1 0 0 -1 1]/2
interaction between Diagnosis and Gender for Left
[ 1 0 -1 0 -1 0 1 0]/2
interaction between Diagnosis and Gender for Right
[ 0 1 0 -1 0 -1 0 1]/2
Many thanks in advance.
Gabriel
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