I want to create a design for 4 attributes with 3 levels and 2 attributes with 2 levels.
When I look to a possible basic plan, a design would be possible with 16 choicesets.
However NGene only find a solution with 36 choicesets. I believe that this is due to the fact that Engene strives for attribute level balance.
I am wondering how I can let NGene assume NO attribute level balance. In the manual I only see instructions for ;fact or ;eff design, but not for ;orth: seq design and that is where I want to apply it.
Does anybody knows how to do this?
Here is my Ngene code which result in 36 choice sets.
design
;alts = alt1, alt2, alt3
;rows = 16
; orth = seq
;model:
U(alt1) = pl*PL[0,1,2] + pef*PEF[0,1,2] + fs*F[0,1] + br*BR[0,1] + er*ER[0,1,2] + svc*SVC[0,1,2] /
U(alt2) = pl*PL + pef*PEF + fs*FS + br*BR + er*ER + svc*SVC /
U(alt3) = pl*PL + pef*PEF + fs*FS + br*BR + er*ER + svc*SVC /
$