Mplus Users Guide v6.. - Muthén & Muthén

MODEL Commandy13 y14 y15 (1);specifies that the factor loadings of y2 through y15 are constrained to beequal. The factor loading of y1 is fixed at one as the default.The following statement,f1 BY y1 y2 y3 y4 y5 y6 y7 y8 y9 y10 y11 y12y13 y14 y15 (1);specifies that the factor loadings of y13, y14, and y15 are constrained tobe equal because (1) refers to only the information on the line on whichit is located.The following statement,f1 BY y1 y2 y3 y4 y5 (1)y6 y7 y8 y9 y10 (2)y11 y12 y13 y14 y15 (3);specifies that the factor loading of y1 is fixed at one and that the factorloadings of y2, y3, y4, and y5 are held equal, that the factor loadings ofy6, y7, y8, y9, and y10 are held equal, and that the factor loadings ofy11, y12, y13, y14, and y15 are held equal.Following are examples of how to constrain the parameters of means,intercepts and/or thresholds to be equal.[y1 y2 y3] (1);indicates that the means/intercepts of variables y1, y2, and y3 areconstrained to be equal. The statements[u1$1 u2$1 u3$1] (2);[u1$2 u2$2 u3$2] (3);[u1$3 u2$3 u3$3] (4);indicate that the first threshold for variables u1, u2, and u3 areconstrained to be equal; that the second threshold for variables u1, u2,and u3 are constrained to be equal; and that the third threshold forvariables u1, u2, and u3 are constrained to be equal. Out of nine591