Random Intercept, No slope - Plots PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
Message/Author
 Kieran Ayling posted on Friday, April 29, 2016 - 6:05 am
Hi, I have been trying to run a growth model, with random intercepts but no slope (or a slope of 0) for individuals with varying times of observation using the following key bits of syntax. It runs fine, but when I look at Plots>Observed individual values and ask for individually-fitted curves, some of my lines have a slope. Am I incorrectly specifying how to get a random intercept with no slope, or is the plot showing me something different?

TSCORES = time11-time63;
IDVARIABLE IS id;
ANALYSIS:
ESTIMATOR = MLR;
TYPE = RANDOM;
PROCESSORS = 4;


MODEL:
i | exppos11-exppos63 AT time11-time63;

PLOT:
TYPE = PLOT1 PLOT2 PLOT3;
SERIES = exppos11-exppos63(*);
 Bengt O. Muthen posted on Saturday, April 30, 2016 - 12:37 pm
SERIES with * uses time scores of 1, 2,, etc. There isn't an automatic plot with AT. You have to plot it outside Mplus.
 Kieran Ayling posted on Sunday, May 01, 2016 - 2:46 am
Ok, so just to clarify... Am I right in understanding that my model results are giving me what I expected and that any factor scores I save using the above specification are giving me the intercept for each individual with a slope of 0 (i.e. no slope)?
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