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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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1618 UNIANOVA<br />

QREGW Ryan-Einot-Gabriel-Welsch’s multiple stepdown procedure based on<br />

the Studentized range test.<br />

T2 Tamhane’s T2. Tamhane’s pairwise comparisons test based on a t test.<br />

This test can be applied in situations where the variances are unequal.<br />

T3 Dunnett’s T3. Pairwise comparisons test based on the Studentized<br />

maximum modulus. This test is appropriate when the variances are<br />

unequal.<br />

GH Games and Howell’s pairwise comparisons test based on the Studentized<br />

range test. This test can be applied in situations where the variances<br />

are unequal.<br />

C Dunnett’s C. Pairwise comparisons based on the weighted average of<br />

Studentized ranges. This test can be applied in situations where the<br />

variances are unequal.<br />

WALLER(kratio) Waller-Duncan t test. This test uses a Bayesian approach. It is<br />

restricted to cases with equal sample sizes. For cases with unequal<br />

sample sizes, the harmonic mean of the sample size is used. The k-ratio<br />

is the Type 1/Type 2 error seriousness ratio. The default value is 100.<br />

You can specify an integer greater than 1 within parentheses.<br />

EMMEANS Subcommand<br />

EMMEANS displays estimated marginal means of the dependent variable in the cells (with<br />

covariates held at their overall mean value) and their standard errors for the specified factors.<br />

Note that these are predicted, not observed, means. The estimated marginal means are calculated<br />

using a modified definition by Searle, Speed, and Milliken (1980).<br />

• TABLES, followed by an option in parentheses, is required. COMPARE is optional; if specified,<br />

it must follow TABLES.<br />

• Multiple EMMEANS subcommands are allowed. Each is treated independently.<br />

• If identical EMMEANS subcommands are specified, only the last identical subcommand is<br />

in effect. EMMEANS subcommands that are redundant but not identical (for example,<br />

crossed factor combinations such as A*B and B*A) are all processed.<br />

TABLES(option) Table specification. Valid options are the keyword OVERALL, factors<br />

appearing on the factor list, and crossed factors constructed of factors<br />

on the factor list. Crossed factors can be specified using an asterisk (*)<br />

or the keyword BY. All factors in a crossed factor specification must<br />

be unique.<br />

If OVERALL is specified, the estimated marginal means of the dependent<br />

variable are displayed, collapsing over between-subjects factors.<br />

If a between-subjects factor, or a crossing of between-subjects factors,<br />

is specified on the TABLES keyword, UNIANOVA collapses over any<br />

other between-subjects factors before computing the estimated<br />

marginal means for the dependent variable.

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