Hi, I have a quesiton about my ANOVA design. I have the following 2nd-level covariates:

age: 19 25 21 21 24 23 29 35 21 25  

sex: 1 0 1 1 0 1 0 1 0 1

motion: 0.2 0.3 0.2 0.4 0.3 0.4 0.4 0.1 0.1 0.2

HC:       1 1 1 1 1 0 0 0 0 0

FEP:      0 0 0 0 0 1 1 1 1 1

group1: 0 0 0 0 0 0 0 0 1 1

group2: 1 0 1 1 0 1 0 0 0 0

group4: 0 1 0 0 1 0 1 1 0 0

I wanted to run a diagnosis (HC, FEP) by group (1, 2, 4) interaction so I selected these variables and using the covariate tools I created interaction terms :

HC*group1, HC*group2, HC*group4, FEP*group1, FEP*group2, and FEP*group4

Then, on the results tab I did the following contrast to run a 2x3 ancova while controlling for age, sex, and motion: 

 [ 0 0 0 -1 1 0 0 0 0; 0 0 0 0 -1 1 0 0 0; 0 0 0 0 0 -1 1 0 0; 0 0 0 0 0 0 -1 1 0; 0 0 0 0 0 0 0 -1 1 ]

The first 3 zeros are for controlling for age, sex, and motion, and the rest are the variables of interest. 

Is this correct? I did not get any warnings or errors so I assumed its correct, but just wanting to make sure this is correct. 

Thank you.