TEST Subcommand (UNIANOVA command)

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.