Mplus VERSION 8.8
MUTHEN & MUTHEN
04/19/2022 11:11 PM
INPUT INSTRUCTIONS
TITLE: this is an example of a QTL sibling model
for a continuous outcome using parameter constraints
DATA: FILE = ex5.23.dat;
VARIABLE: NAMES = y1 y2 pihat;
USEVARIABLES = y1 y2;
CONSTRAINT = pihat;
MODEL: [y1-y2] (1);
y1-y2 (var);
y1 WITH y2 (cov);
MODEL CONSTRAINT:
NEW(a e q);
var = a**2 + e**2 + q**2;
cov = 0.5*a**2 + pihat*q**2;
INPUT READING TERMINATED NORMALLY
this is an example of a QTL sibling model
for a continuous outcome using parameter constraints
SUMMARY OF ANALYSIS
Number of groups 1
Number of observations 2000
Number of dependent variables 2
Number of independent variables 0
Number of continuous latent variables 0
Observed dependent variables
Continuous
Y1 Y2
Estimator ML
Information matrix OBSERVED
Maximum number of iterations 1000
Convergence criterion 0.500D-04
Maximum number of steepest descent iterations 20
Input data file(s)
ex5.23.dat
Input data format FREE
UNIVARIATE SAMPLE STATISTICS
UNIVARIATE HIGHER-ORDER MOMENT DESCRIPTIVE STATISTICS
Variable/ Mean/ Skewness/ Minimum/ % with Percentiles
Sample Size Variance Kurtosis Maximum Min/Max 20%/60% 40%/80% Median
Y1 -0.003 -0.005 -4.338 0.05% -1.006 -0.325 -0.019
2000.000 1.482 -0.124 4.221 0.05% 0.290 1.047
Y2 0.029 0.054 -4.840 0.05% -1.028 -0.293 -0.022
2000.000 1.572 0.012 4.059 0.05% 0.328 1.049
PIHAT 0.508 -0.038 0.000 19.95% 0.250 0.500 0.500
2000.000 0.127 -1.318 1.000 20.90% 0.750 1.000
THE MODEL ESTIMATION TERMINATED NORMALLY
MODEL FIT INFORMATION
Number of Free Parameters 4
Loglikelihood
H0 Value -6355.741
Information Criteria
Akaike (AIC) 12719.482
Bayesian (BIC) 12741.885
Sample-Size Adjusted BIC 12729.177
(n* = (n + 2) / 24)
MODEL RESULTS
Two-Tailed
Estimate S.E. Est./S.E. P-Value
Y1 WITH
Y2 999.000 0.000 999.000 999.000
Means
Y1 0.012 0.023 0.546 0.585
Y2 0.012 0.023 0.546 0.585
Variances
Y1 1.528 0.037 41.774 0.000
Y2 1.528 0.037 41.774 0.000
New/Additional Parameters
A 0.848 0.064 13.218 0.000
E 0.622 0.045 13.822 0.000
Q 0.649 0.059 11.078 0.000
QUALITY OF NUMERICAL RESULTS
Condition Number for the Information Matrix 0.188E-03
(ratio of smallest to largest eigenvalue)
Beginning Time: 23:11:19
Ending Time: 23:11:19
Elapsed Time: 00:00:00
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