SPSS® 12.0 Command Syntax Reference

1610 UNIANOVA
Example
UNIANOVA DEP BY A B
/PLOT = SPREADLEVEL PROFILE(A A*B A*B*C)
/DESIGN.
Assume each of the factors A, B, and C has three levels.
• Spread-versus-level plots are produced showing observed cell means versus standard
deviations and observed cell means versus variances.
• Five profile plots are produced. For factor A, a line plot of estimated means at each level
of A is produced (one plot). For the two-way crossed factor combination A*B, a multipleline
plot of estimated means at each level of A, with a separate line for each level of B, is
produced (one plot). For the three-way crossed factor combination A*B*C, a multiple-line
plot of estimated means at each level of A, with a separate line for each level of B, is
produced for each of the three levels of C (three plots).
TEST Subcommand
The TEST subcommand allows you to test a hypothesis term against a specified error term.
• TEST is valid only for univariate analyses. Multiple TEST subcommands are allowed,
each executed independently.
• You must specify both the hypothesis term and the error term. There is no default.
• The hypothesis term is specified before the keyword VS. It must be a valid effect specified
or implied on the DESIGN subcommand.
• The error term is specified after the keyword VS. You can specify either a linear combination
or a value. The linear combination of effects takes the general form:
coefficient*effect +/– coefficient*effect ...
• All effects in the linear combination must be specified or implied on the DESIGN subcommand.
Effects specified or implied on DESIGN but not listed after VS are assumed to have
a coefficient of 0.
• Duplicate effects are allowed. UNIANOVA adds coefficients associated with the same
effect before performing the text. For example, the linear combination 5*A–0.9*B–A
will be combined to 4*A–0.9B.
• A coefficient can be specified as a fraction with a positive denominator—for example,
1/3 or –1/3, but 1/–3 is invalid.
• If you specify a value for the error term, you must specify the degrees of freedom after
the keyword DF. The degrees of freedom must be a positive real number. DF and the
degrees of freedom are optional for a linear combination.
Example
UNIANOVA DEP BY A B
/TEST = A VS B + A*B
/DESIGN = A, B, A*B.
• A is tested against the pooled effect of B + A*B.