Lydia Zhang posted on Monday, February 05, 2018 - 5:37 pm
Hi, I am trying to use the manual 3-step approach to examine the relationship between latent classes and children's developmental outcomes over time. In the third step, I conducted growth-curve modeling to see if child trajectories differ by latent classes. Outcome variables are at three time waves (OUTCOME1-OUTCOME3). Latent variables are U1-U4. The first step works well but there are errors in the third step. Could anyone help me to check why it is not working?
Lydia Zhang posted on Monday, February 05, 2018 - 5:41 pm
TITLE:INPUT FOR FIRST STEP;
DATA: File is test_1.dat ; Names are OUTCOME1 OUTCOME2 OUTCOME3 U1 U2 U3 U4; Categorical = U1 U2 U3 U4; Classes = N(3); Usevar=U1 U2 U3 U4 ; Auxiliary=OUTCOME1 OUTCOME2 OUTCOME3 Analysis: Type = Mixture; Savedata: File = test_PROB.dat; Save = cprob;
Lydia Zhang posted on Monday, February 05, 2018 - 5:42 pm
TITLE: INPUT FOR THIRD STEP DATA: File is test_PROB.dat; Names are U1 U2 U3 U4 OUTCOME1 OUTCOME2 OUTCOME3 cprob1 cprob2 cprob3 cprob4 N; Usevar=OUTCOME1-OUTCOME3 N; Classes = C(3); nominal = N; Analysis: Type = Mixture; Starts=0
Lydia Zhang posted on Tuesday, February 06, 2018 - 4:46 pm
Thank you Dr. Muthen! I have a following up question about the manual 3-step approach. I conducted model test to see if the parameters in each classes(y on x) are significantly different. But there is nothing in the output. I am wondering if there is anything wrong in my input?
VARIABLE: Names are Y X N; Missing are all(-9999); Usevar=Y X N; Classes = C(3); nominal = N Analysis: Type = Mixture; Starts=0