CONDITIONAL and UNCONDITIONAL Keywords (MANOVA: Multivariate command)

When several analysis groups are specified on a single ANALYSIS subcommand, you can control how each list is to be processed by specifying CONDITIONAL or UNCONDITIONAL in the parentheses immediately following the ANALYSIS subcommand. The default is UNCONDITIONAL.

UNCONDITIONAL. Process each analysis group separately, without regard to other lists. This is the default.

CONDITIONAL. Use variables specified in one analysis group as covariates in subsequent analysis groups.

  • CONDITIONAL analysis is not carried over from one ANALYSIS subcommand to another.
  • You can specify a final covariate list outside the parentheses. These covariates apply to every list within the parentheses, regardless of whether you specify CONDITIONAL or UNCONDITIONAL. The variables on this global covariate list must not be specified in any individual lists.

Example

MANOVA A B C BY FAC(1,4) WITH D, E
  /ANALYSIS = (A, B / C / D WITH E)
  /DESIGN.
  • The first analysis uses A and B as dependent variables and uses no covariates.
  • The second analysis uses C as a dependent variable and uses no covariates.
  • The third analysis uses D as the dependent variable and uses E as a covariate.

Example

MANOVA A, B, C, D, E BY FAC(1,4) WITH F G
  /ANALYSIS = (A, B / C / D WITH E) WITH F G
  /DESIGN.
  • A final covariate list WITH F G is specified outside the parentheses. The covariates apply to every list within the parentheses.
  • The first analysis uses A and B, with F and G as covariates.
  • The second analysis uses C, with F and G as covariates.
  • The third analysis uses D, with E, F, and G as covariates.
  • Factoring out F and G is the only way to use them as covariates in all three analyses, since no variable can be named more than once on an ANALYSIS subcommand.

Example

MANOVA A B C BY FAC(1,3)
  /ANALYSIS(CONDITIONAL) = (A WITH B / C)
  /DESIGN.
  • In the first analysis, A is the dependent variable, B is a covariate, and C is not used.
  • In the second analysis, C is the dependent variable, and both A and B are covariates.