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SPSS® 12.0 Command Syntax Reference

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890 MANOVA: Repeated Measures<br />

• The transformation matrix requested by the PRINT subcommand looks like Figure 1.<br />

Figure 1 Transformation matrix<br />

CONST LEVELDIF TRIAL1 TRIAL2 INTER1 INTER2<br />

LOW1 0.408 0.408 -0.500 -0.289 -0.500 -0.289<br />

LOW2 0.408 0.408 0.500 -0.289 0.500 -0.289<br />

LOW3 0.408 0.408 0.000 0.577 0.000 0.577<br />

HI1 0.408 -0.408 -0.500 -0.289 0.500 0.289<br />

HI2 0.408 -0.408 0.500 -0.289 -0.500 0.289<br />

HI3 0.408 -0.408 0.000 0.577 0.000 -0.577<br />

PRINT Subcommand<br />

The following additional specifications on PRINT are useful in repeated measures analysis:<br />

SIGNIF(AVERF) Averaged F tests for use with repeated measures. This is the default<br />

display in repeated measures analysis. The averaged F tests in the<br />

multivariate setup for repeated measures are equivalent to the<br />

univariate (or split-plot or mixed-model) approach to repeated<br />

measures.<br />

SIGNIF(AVONLY) Only the averaged F test for repeated measures. AVONLY produces the<br />

same output as AVERF and suppresses all other SIGNIF output.<br />

SIGNIF(HF) The Huynh-Feldt corrected significance values for averaged<br />

univariate F tests.<br />

SIGNIF(GG) The Greenhouse-Geisser corrected significance values for averaged<br />

univariate F tests.<br />

SIGNIF(EFSIZE) The effect size for the univariate F and t tests.<br />

• The keywords AVERF and AVONLY are mutually exclusive.<br />

• When you request repeated measures analysis with the WSFACTORS subcommand, the<br />

default display includes SIGNIF(AVERF) but does not include the usual SIGNIF(UNIV).<br />

• The averaged F tests are appropriate in repeated measures because the dependent variables<br />

that are averaged actually represent contrasts of the WSFACTOR variables. When the analysis<br />

is not doubly multivariate, as discussed above, you can specify PRINT=SIGNIF(UNIV) to<br />

obtain significance tests for each degree of freedom, just as in univariate MANOVA.<br />

<strong>Reference</strong>s<br />

Burns P. R. 1984. Multiple comparison methods in MANOVA. Proceedings of the 7th SPSS<br />

Users and Coordinators Conference.<br />

Green, P. E. 1978. Analyzing multivariate data. Hinsdale, Ill: The Dryden Press.<br />

Huberty, C. J. 1972. Multivariate indices of strength of association. Multivariate Behavioral<br />

Research, 7: 523–516.<br />

Muller, K. E., and B. L. Peterson. 1984. Practical methods for computing power in testing the multivariate<br />

general linear hypothesis. Computational Statistics and Data Analysis, 2: 143–158.<br />

Pillai, K. C. S. 1967. Upper percentage points of the largest root of a matrix in multivariate analysis.<br />

Biometrika, 54: 189–194.

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