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. Author manuscript; available in PMC: 2014 Aug 25.
Published in final edited form as: Br J Math Stat Psychol. 2013 Feb 25;67(1):94–116. doi: 10.1111/bmsp.12008

Table 1.

Monte Carlo Estimates (Mean and Variance) of a Multigroup LGM at the Normative Condition

Standard estimation Mixture estimation
Group Growth factor Parameter Generated Generated Missing Same
G1 Intercept Mean 5.0 5.000 (.074) 5.000 (.074) 5.000 (.074) 5.000 (.074)
Variance 1.0 1.019 (.121) 1.019 (.121) 1.019 (.121) 1.019 (.123)
Linear slope Mean 0.1 0.098 (.024) 0.098 (.024) 0.098 (.024) 0.098 (.024)
Variance 0.05 0.050 (.014) 0.050 (.014) 0.050 (.015) 0.048 (.014)
G2 Intercept Mean 3.0 2.988 (.131) 2.988 (.131) 2.988 (.131) 2.988 (.132)
Variance 1.0 1.019 (.121) 1.019 (.121) 1.019 (.121) 1.019 (.123)
Linear slope Mean 0.5 0.501 (.043) 0.501 (.043) 0.501 (.043) 0.500 (.043)
Variance 0.05 0.050 (.014) 0.050 (.014) 0.050 (.015) 0.048 (.014)
G3 Intercept Mean 7.0 6.990 (.188) 6.990 (.188) 6.990 (.188) 6.990 (.188)
Variance 1.0 1.019 (.121) 1.019 (.121) 1.019 (.121) 1.019 (.123)
Linear slope Mean −0.1 −0.098 (.061) −0.098 (.061) −0.098 (.061) −0.098 (.061)
Variance 0.05 0.050 (.014) 0.050 (.014) 0.050 (.015) 0.048 (.014)
G4 Intercept Mean 6.0 5.980 (.253) 5.980 (.253) 5.980 (.260) 5.964 (.283)
Variance 1.0 1.019 (.121) 1.019 (.121) 1.019 (.122) 1.019 (.123)
Linear slope Mean −0.6 −0.615 (.083) −0.615 (.083) −0.615 (.107) −0.600 (.064)
Variance 0.05 0.050 (.014) 0.050 (.014) 0.050 (.015) 0.048 (.014)

Note. Under the ‘Generated’ columns, estimates were from the data sets generated at the normative values: 5 indicators, linear slope, 20% of missing proportion, no covariate, a sample size of 500, and 100 replications. Four groups with proportions, 65% (NG1= 325), 20% (NG2 = 100), 10% (NG3 = 50), and 5% (NG4 = 25), were specified for N = 500. Under the ‘Missing’ and ‘Same’ columns, all the responses on the 5th time point in Group 4 were completely missing and had the same response, respectively.