Mplus syntax to accompany models and analyses in:
Selig, J. P., & Preacher, K. J. (2009). Mediation models for longitudinal data in developmental research. Research in Human Development, 6, 144-164.
Mplus syntax for the latent difference score (LDS) model.
TITLE: Selig & Preacher (2009)
DATA: FILE IS MASTER.TXT;
VARIABLE: NAMES ARE
MDEP6A MDEP6B MDEP6C
MDEP15A MDEP15B MDEP15C
SENS15 INTRU15 POSREG15
SENS24 INTRU24 POSREG24
T_ANXDP T_WITHD T_AGRES T_DESTR
T_ANXD36 T_WITH36 T_AGRE36 T_DEST36;
MISSING IS .;
MODEL:
!LAMBDA
MDEP1 BY MDEP6A@1
MDEP6B(1)
MDEP6C(2);
MDEP2 BY MDEP15A@1
MDEP15B(1)
MDEP15C(2);
SENS2 BY SENS15*(3)
INTRU15(4)
POSREG15@1;
SENS3 BY SENS24*(3)
INTRU24(4)
POSREG24@1;
CBCL3 BY T_ANXDP@1
T_WITHD(5)
T_AGRES(6)
T_DESTR(7);
CBCL4 BY T_ANXD36@1
T_WITH36(5)
T_AGRE36(6)
T_DEST36(7);
!THETA
MDEP6A*; MDEP6B*; MDEP6C*;
MDEP15A*; MDEP15B*; MDEP15C*;
SENS15*; INTRU15*; POSREG15*;
SENS24*; INTRU24*; POSREG24*;
T_ANXDP*; T_WITHD*; T_AGRES*; T_DESTR*;
T_ANXD36*; T_WITH36*; T_AGRE36*; T_DEST36*;
MDEP6A WITH MDEP15A*; MDEP6B WITH MDEP15B*; MDEP6C WITH MDEP15C*;
SENS15 WITH SENS24*; INTRU15 WITH INTRU24*; POSREG15 WITH POSREG24*;
T_ANXDP WITH T_ANXD36*; T_WITHD WITH T_WITH36*;
T_AGRES WITH T_AGRE36*; T_DESTR WITH T_DEST36*;
POSREG24 WITH SENS24*;
!BETA
MDEP2 ON MDEP1 @1;
MDIFF BY MDEP2 @1;
MDIFF ON MDEP1*;
!PSI
MDEP1*; MDEP2@0; MDIFF*;
!BETA
SENS3 ON SENS2 @1;
SDIFF BY SENS3 @1;
SDIFF ON SENS2*;
!PSI
SENS2*; SENS3@0; SDIFF*;
!BETA
CBCL4 ON CBCL3 @1;
CDIFF BY CBCL4 @1;
CDIFF ON CBCL3*;
!PSI
CBCL3*; CBCL4@0; CDIFF*;
!BETA
SENS2 ON MDEP1 MDIFF;
SDIFF ON MDEP1 MDIFF;
CBCL3 ON MDEP1 MDIFF SENS2 SDIFF;
CDIFF ON MDEP1 MDIFF SENS2 SDIFF;
MODEL INDIRECT:
!From MDIFF->SENS2->CBCL3;
CBCL3 IND SENS2 MDIFF;
!From MDEP1->SDIFF->CDIFF;
CDIFF IND SDIFF MDEP1;
!From MDEP1->SENS2->CBCL3;
CBCL3 IND SENS2 MDEP1;
!From MDEP1->SDIFF->CBCL3;
CBCL3 IND SDIFF MDEP1;