Riya Rai posted on Monday, July 23, 2018 - 4:15 pm
Our research project is investigating how trajectories of maternal depressive symptoms from gestation to eleven years postpartum impact child behavioural development at three time points in early to mid-childhood. We have a total of five dichotomized covariates. We are running a latent growth model on MPlus, and are getting the following error message:
THE MODEL ESTIMATION TERMINATED NORMALLY
THE STANDARD ERRORS OF THE MODEL PARAMETER ESTIMATES MAY NOT BE TRUSTWORTHY FOR SOME PARAMETERS DUE TO A NON-POSITIVE DEFINITE FIRST-ORDER DERIVATIVE PRODUCT MATRIX. THIS MAY BE DUE TO THE STARTING VALUES BUT MAY ALSO BE AN INDICATION OF MODEL NONIDENTIFICATION. THE CONDITION NUMBER IS 0.111D-18. PROBLEM INVOLVING PARAMETER: Parameter 135, Group INC: PARITY
However, when we try to get rid of our "parity" covariate, it will have the same warning message for another covariate. I would greatly appreciate any help I can get in fixing this. Thanks everyone.