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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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888 MANOVA: Repeated Measures<br />

Example<br />

MANOVA JANLO,JANHI,FEBLO,FEBHI,MARLO,MARHI BY SEX(1,2)<br />

/WSFACTORS MONTH(3) STIMULUS(2)<br />

/WSDESIGN MONTH, STIMULUS<br />

/WSDESIGN<br />

/DESIGN SEX.<br />

• There are six dependent variables, corresponding to three months and two different levels<br />

of stimulus.<br />

• The dependent variables are named on the MANOVA variable list in such an order that the<br />

level of stimulus varies more rapidly than the month. Thus, STIMULUS is named last on<br />

the WSFACTORS subcommand.<br />

• The first WSDESIGN subcommand specifies only the main effects for within-subjects<br />

factors. There is no MONTH by STIMULUS interaction term.<br />

• The second WSDESIGN subcommand has no specifications and, therefore, invokes the<br />

default within-subjects design, which includes the main effects and their interaction.<br />

MWITHIN Keyword for Simple Effects<br />

You can use MWITHIN on either the WSDESIGN or the DESIGN subcommand in a model with<br />

both between- and within-subjects factors to estimate simple effects for factors nested within<br />

factors of the opposite type.<br />

Example<br />

MANOVA WEIGHT1 WEIGHT2 BY TREAT(1,2)<br />

/WSFACTORS=WEIGHT(2)<br />

/DESIGN=MWITHIN TREAT(1) MWITHIN TREAT(2)<br />

MANOVA WEIGHT1 WEIGHT2 BY TREAT(1,2)<br />

/WSFACTORS=WEIGHT(2)<br />

/WSDESIGN=MWITHIN WEIGHT(1) MWITHIN WEIGHT(2)<br />

/DESIGN.<br />

• The first DESIGN tests the simple effects of WEIGHT within each level of TREAT.<br />

• The second DESIGN tests the simple effects of TREAT within each level of WEIGHT.<br />

MEASURE Subcommand<br />

In a doubly multivariate analysis, the dependent variables represent multiple variables<br />

measured under the different levels of the within-subjects factors. Use MEASURE to assign<br />

names to the variables that you have measured for the different levels of within-subjects<br />

factors.<br />

• Specify a list of one or more variable names to be used in labeling the averaged results.<br />

If no within-subjects factor has more than two levels, MEASURE has no effect.<br />

• The number of dependent variables on the DESIGN subcommand should equal the product<br />

of the number of cells in the within-subjects design and the number of names on MEASURE.<br />

• If you do not enter a MEASURE subcommand and there are more dependent variables than<br />

cells in the within-subjects design, MANOVA assigns names (normally MEAS.1, MEAS.2,<br />

etc.) to the different measures.

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