Mplus Users Guide v6.. - Muthén & Muthén

MODEL CommandIn addition, the NCSIZES, CSIZES, CLUSTER, BETWEEN, andWITHIN options of the MONTECARLO command are used for thegeneration of clustered data.THE MODEL COVERAGE COMMANDIn Monte Carlo simulation studies, the MODEL command describes notonly the analysis model but also provides values for each parameter thatare used both as the population parameter values for computing coverageand as starting values in the estimation of the model. If the MODELCOVERAGE command is used, coverage is computed using thepopulation parameter values specified in the MODEL COVERAGEcommand, and the values specified in the MODEL command are usedonly as starting values. The MODEL COVERAGE command hasspecial options for multiple group models, mixture models, andmultilevel models.In MODEL COVERAGE, each parameter in the model must bespecified followed by the @ symbol or the asterisk (*) and thepopulation parameter value. Any model parameter not specified willhave the value of zero as the population parameter value.Parameter estimates can be saved from a real data analysis using theESTIMATES option of the SAVEDATA command and used in asubsequent Monte Carlo analysis as population parameter values. Thisis done by using the COVERAGE option of the MONTECARLOcommand.MODEL COVERAGE:The MODEL COVERAGE command is used to provide the populationparameter values to be used for computing coverage for single groupanalysis and the overall analysis model for multiple group analysis.MODEL COVERAGE-label:MODEL COVERAGE followed by a dash and a label is used in multiplegroup analysis to provide group-specific parameter values to be used incomputing coverage. The label following the dash refers to the group.The first group is referred to by g1, the second group by g2, and so on.627