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Mplus Users Guide v6.. - Muthén & Muthén

Mplus Users Guide v6.. - Muthén & Muthén

Mplus Users Guide v6.. - Muthén & Muthén

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MODEL Commandwhere c is a parameter that constrains the means to change linearlyacross the three variables. The value .6 following the asterisk (*)specifies that the value .6 will be used as a starting value for modelestimation. If the analysis is a Monte Carlo simulation study, the valuewill also be used as a coverage value.THE CONSTRAINT OPTION OF THE VARIABLECOMMANDThe CONSTRAINT option of the VARIABLE command is used toidentify variables that can be used in the MODEL CONSTRAINTcommand. These can be not only variables used in the analysis but alsovariables not used in the analysis. Any variable listed on the NAMESstatement of the DATA command or created using the DEFINEcommand can be listed on the CONSTRAINT statement unless they arepart of the following options: GROUPING, PATTERN, COHORT,COPATTERN, CLUSTER, STRATIFICATION, and AUXILIARY.Variables that are part of these options can be used in DEFINE to createnew variables that can be used on the CONSTRAINT statement. TheCONSTRAINT option is specified as follows:CONSTRAINT = y1 u1;where y1 and u1 are variables that can be used in the MODELCONSTRAINT command.DEFINING LINEAR AND NON-LINEARCONSTRAINTSLinear and non-linear constraints can be defined using the equal sign (=),the greater than sign (>), the less than sign (

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