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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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MANOVA: Repeated Measures 885<br />

• If you use constant covariates, you must specify them in parentheses. If you use both<br />

constant and varying covariates, constant variates must be specified after all varying<br />

covariates.<br />

Example<br />

MANOVA MATH1 TO MATH4 BY METHOD(1,2) WITH PHYS1 TO PHYS4 (SES)<br />

/WSFACTORS=SEMESTER(4).<br />

• The four dependent variables represent a score measured four times (corresponding to the<br />

four levels of SEMESTER).<br />

• The four varying covariates PHYS1 to PHYS4 represents four measurements of another<br />

score.<br />

• SES is a constant covariate. Its value does not change over the time covered by the four<br />

levels of SEMESTER.<br />

• Default contrast (POLYNOMIAL) is used.<br />

WSFACTORS Subcommand<br />

WSFACTORS names the within-subjects factors and specifies the number of levels for each.<br />

• For repeated measures designs, WSFACTORS must be the first subcommand after the<br />

MANOVA variable list.<br />

• Only one WSFACTORS subcommand is permitted per execution of MANOVA.<br />

• Names for the within-subjects factors are specified on the WSFACTORS subcommand.<br />

Factor names must not duplicate any of the dependent variables, factors, or covariates<br />

named on the MANOVA variable list.<br />

• If there are more than one within-subjects factors, they must be named in the order<br />

corresponding to the order of the dependent variables on the MANOVA variable list.<br />

MANOVA varies the levels of the last-named within-subjects factor most rapidly when<br />

assigning dependent variables to within-subjects cells (see the example below).<br />

• Levels of the factors must be represented in the data by the dependent variables named on<br />

the MANOVA variable list.<br />

• Enter a number in parentheses after each factor to indicate how many levels the factor has.<br />

If two or more adjacent factors have the same number of levels, you can enter the number<br />

of levels in parentheses after all of them.<br />

• Enter only the number of levels for within-subjects factors, not a range of values.<br />

• The number of cells in the within-subjects design is the product of the number of levels<br />

for all within-subjects factors.<br />

Example<br />

MANOVA X1Y1 X1Y2 X2Y1 X2Y2 X3Y1 X3Y2 BY TREATMNT(1,5) GROUP(1,2)<br />

/WSFACTORS=X(3) Y(2)<br />

/DESIGN.<br />

• The MANOVA variable list names six dependent variables and two between-subjects<br />

factors, TREATMNT and GROUP.

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