Last 3 Days
How to free the variance of model ?
Latent Variable Mixture Modeling
posted on Friday, April 20, 2007 - 12:36 am
I have a variable y, that y is the IRT result of 10101 students' ability value.
Now I want to estimate the normal mixture model of y with 3 class latent model in the y.
My M-PLUS program is followed:
title: TASA 2005 standard setting cut score
data: file is ab.dat;
variable: names is y;
classes =c (3);
analysis: TYPE = MIXTURE;
THE MODEL RESULTS are followed:
CLASS MEANS Y VARIANCES Y
CLASS1 -0.863 0.347
CLASS2 -3.567 0.347
CLASS3 0.435 0.347
MY VARIANCE ALL ARE EQUAL 0.347.
Can you help me to free the VARIANCES ?
Linda K. Muthen
posted on Friday, April 20, 2007 - 7:10 am
You free them by mentioning them in the class-specific parts of the model.
Back to top
Add Your Message Here
This is a private posting area. Only registered users and moderators may post messages here.
Enable HTML code in message
Automatically activate URLs in message