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