Multitrait-multimethod analysis
!
!  Data from
!   Byrne & Goffin (1993) Modeling MTMM data from additive and multiplicative
!   covariance structures: An audit of construct validity. 
!   Multivariate Behavioral Research 28:67-96
!
#define methods 4  ! number of methods
#define traits 3   ! number of traits
#define mxt 12     ! methods times traits
Data Nobservations=100 Ninput=12 Ngroup=1
Cmatrix File=kothan.dat
Matrices
T Full methods traits Free ! Paths from traits to vars for each method
M Full traits methods Free ! Paths from methods to vars for each trait
S Stan traits traits Free  ! Correlations among traits
L Stan methods methods Free! Correlations among methods 
E Diag mxt mxt Free        ! Error variances
U Unit methods 1           ! U, V, I & J are used to pattern the matrices
V Unit traits 1            ! appropriately.
I Iden methods methods 
J Iden traits traits
Covariance 
(T@V).(U@J)*S*((T@V).(U@J))' +
(U@M).(I@V)*L*((U@M).(I@V))' +
E.E /
Start .3 all
Start 1 E 1 1 to E mxt mxt
Option iterations=500
End