TITLE: this is an example of a factor (IRT) mixture
analysis with binary latent class and factor indicators
DATA: FILE = ex7.27.dat;
VARIABLE: NAMES = u1-u8;
CATEGORICAL = u1-u8;
CLASSES = c (2);
ANALYSIS: TYPE = MIXTURE;
ALGORITHM = INTEGRATION;
STARTS = 50 5;
MODEL: %OVERALL%
f BY u1-u8;
[f@0];
%c#1%
f BY u1@1 u2-u8;
f;
[u1$1-u8$1];
%c#2%
f BY u1@1 u2-u8;
f;
[u1$1-u8$1];
OUTPUT: TECH1 TECH8;