Mplus Users Guide v6.. - Muthén & Muthén

CHAPTER 15and saved using another computer program. Each record of the file mustcontain one data set name. For example, if five data sets are beinganalyzed, the contents of the file would be:data1.datdata2.datdata3.datdata4.datdata5.datwhere data1.dat, data2.dat, data3.dat, data4.dat, and data5.dat are thenames of the five data sets generated and saved using another computerprogram. All files must be in the same format. Files saved using theREPSAVE option are in free format.When the MONTECARLO option is used, the results are presented in aMonte Carlo summary format. The output includes the population valuefor each parameter, the average of the parameter estimates acrossreplications, the standard deviation of the parameter estimates acrossreplications, the average of the estimated standard errors acrossreplications, the mean square error for each parameter (M.S.E.), 95percent coverage, and the proportion of replications for which the nullhypothesis that a parameter is equal to zero is rejected at the .05 level.In addition, the average fit statistics and the percentiles for the fitstatistics are given if appropriate. A description of Monte Carlo outputis given in Chapter 12.IMPUTATIONThe IMPUTATION setting of the TYPE option is used when the datasets being analyzed have been generated using multiple imputationprocedures. The file named using the FILE option of the DATAcommand must contain a list of the names of the multiple imputationdata sets to be analyzed. Parameter estimates are averaged over the setof analyses. Standard errors are computed using the average of thesquared standard errors over the set of analyses and the between analysisparameter estimate variation (Rubin, 1987; Schafer, 1997). A chi-squaretest of overall model fit is provided (Asparouhov & Muthén, 2008c;Enders, 2010). The ASCII file containing the names of the data setsmust be created by the user. Each record of the file must contain one458